Hey, are you the owner of Mavic Air Drone, and facing issues like the battery LED lights not glowing, battery not charging, battery not working, battery hibernating or battery voltage fluctuations locked the BMS? Here are the steps to rescue it and make it work again.
In this Tutorial, lets learn how the DJI Mavic air intelligent battery works, its BMS chip and its pinout, battery connections and finally how to remove the PF flag and recovering the battery.
Mavic air battery is also called as an intelligent battery as it has a Battery Management System which monitors everything like cell voltages, temperature, battery health and send it to the drone to display them on the remote controller. Not only monitoring but it also performs safety features like charging the Li-Po cells in limits accordingly, and discharging them automatically when not used for long time to increase the life of them. It also monitors the voltage fluctuations if a battery is malfunctioning and creates power failure Flags which makes battery hibernate and not responsive.
Even when you store the battery for more than 3 months without using in between they switch to hibernation mode. This mode makes the battery unresponsive to push buttons and they wont even charge.
Table of Contents
Mavic Air Battery Specifications
- Nominal Voltage: 11.55 V,
- Max Charge voltage: 13.2 V,
- Rated Capacity: 2375 mAh, 27.43Wh
- Battery Type: Li-Po 3S(3 cells in series)
- BMS Board: BQ9003
Mavic Air Battery BMS Circuit and Pinout
As you can see from the above image the outer cover of the battery is removed so that the BMS Chip is visible. Its BMS has a lock sensor which checks weither battery is fixed inside the drone or not. It also has a temperature sensor attached between batteries to monitor the heat from the batteries while charging and discharging. This BMS has 10 pins.
Mavic Air Battery Pinout diagram
From the about pin diagram you can see there are 10 pins numbered from right to left. The first 4 right pins are for Ground( GND) and the pins 7,8,9,10 are positive terminals. The between pins 5 and 6 are SDA and SCL respectively. There are the Data pins which can communicate through SMBus and I2C communication protocols.
Also read : best IoT Projects
Required Components:
| Product Name | Quantity |  |  |
|---|---|---|---|
| Arduino NANO | 1 | https://amzn.to/3jVNZON | https://amzn.to/3KpUQry |
| Few Connecting Wires | https://amzn.to/3H2BV4e | https://amzn.to/3J0WVu2 |
Want to buy a new battery, buy it from amazon from this link: https://amzn.to/3CMkjK1
Connecting with Arduino
Now lets connect the battery to Arduino with the help of below circuit diagram.
Here we are using Arduino NANO board, you can even use Arduino UNO as well the pins are same and very simple. Just take 3 jumper wires and connect them. So in this case the A4 from Arduino which is SDA is connected to Pin 5 of battery and A5 from Arduino which is SCL is connected to Pin 6. And finally the GND pin from Arduino is connected to any of the 1,2,3,4 pins.
Arduino Code:
After connecting, its time to upload the code for that you need Arduino IDE.
- Download Arduino IDE: here
- Download exclusive Code : here.
- Password for Zip file: circuitschools
After downloading the code Download Xloader: here
Next upload the code to Arduino board using it. Choose the port and Baud rate to 115200.
After uploading the code open serial monitor in Arduino IDE at a baud rate of 115200. There you see the output as below screenshot.
This is an automatic process connect the battery, upload the code, open the serial monitor with baud rate 115200 and with in 5 seconds your battery will glow.
Charge the battery and it will be ready to use. Fly with caution for first use.
Errors and Troubleshooting:
- Battery not connected ……
If you see this error check the wiring between Arduino and Battery. If still error there might be very low voltage in the 3 Li Po cells in it. To solve this you can charge the cells individually with very low current till they reach at least 3.9v and connect it with Arduino.
- Battery Swollen
If the battery is swollen do not pierce or puncture to remove the air from it. If you do so the battery wont hold the voltage eventually making them to die permanently.
To reset mavic battery cycle count refer: DJI Mavic Air battery cycle count reset using Arduino
Video Tutorial:
If you like this project please subscribe to our YouTube Channel “Circuit Schools“ to encourage us to publish more interesting projects. If you have any doubts write to us from below comment section.
hi can u help i need the software for DJI to clear pf flag and battery maintenance pls thank you
CAN SOMEONE PLEASE SEND ME THE CODE TORESET MY MAVIC AIR BATTERIES? 3 DEAD BATTERIES FROM LEFT SITTING JUST A FW MONHS.
Code is already there in the article, please check, download and follow the tutorial to make them work again
Boa noite, o arquivo se encontra corrompido
Could you please send me the code, 2 of my DJI mavic batteries are not responding?
Thanks
Sirve para un dji air 2s?
hi i need try recovery 2 batteries , i not use this batteries a two years and not turn on .
Can you send me the code for dji spark,,the battery is not working i mean the bms,i already charge the battery directly into my smart charger,the only issue is the bms..i hope you can make a tutorial video for dji spark
HI,
any reply to your request ?
hi can you send me code
hi can u help i need the code for DJI mavic mini BFS reader to clear PF flag due to long storage please
i did send a message b4 but i gave wrong email .sorry
thankyou
Sent check your email.
Hi
Can you share the source code?
I would like to try to adapt it for my Mavic air battery.
Thank you very much!
Hello Sir, i have mavic pro bloated battery , can you pls help me how to replace or recell a new battery with ur arduino apps & tools.. thanks so much for ur noble advocacy in helping those who want a cheaper way of doing IoT.
hello! can you please share code with me as well? Thanks a lot
code for battery reset please? it”s flying season and I am down to one battery.
tommysanfilippoo@hotmail.com
Hello,
Excuse me for my approximate English because it is not my native language.
I own a DJI Mavic Air 1 with two batteries. I haven’t used the device for several months and both batteries have gone into deep hibernation. I can’t reload them. The green LEDs do not light up when the button is pressed.
I have an Arduino Nano, I read your very well done tutorial, I only need the code to upload to the Arduino.
Would you be so kind as to send me this code.
Thanks a lot
Cordially
Sent. Please check your Mail for code and instructions.
Hi Thanks for the information.
I have a Mavic air I bought second hand with 3 batteries. One works the others are dead lights will not show.
Batteries are not swollen.
I would like to try your fix please send me the code.
Thanks for the information.
H
code sent please check.
Hi’ I let my batteries sit for a long time can I please have the code?
Hi I have 2 faulty Mavic Air batteries that I would like to try you fix on.
Please send code.
Heney
Hi, friend. Very good the article. I’ve heard about some guys using a USB/SCI adapter to do the same, but as I already have Arduinos here, it willl be very useful and educative to try. Can you share the code? Thanks!
Sent.
Went to charge my mavic battery’s after sitting on the shelf for 6 months, hoping this code will recover them before I need to order a cp2112
Link to code added in the article. Reply here if it works.
Seems to of worked on 1 of my batteries, the other is I think to low on voltage to work. Thanks
Thanks for the help provieded
Hi all,
i have forgotten to load my my mavic air battery. After 3 month i can’t load them again.
Please send me the arduino code to bring them back to live. Thank you
Sent please check your email.
Can you make a tutorial on how to replace the cells of Mavic air with Li-Ion batteries. my original batteries are swollen and dead.
It is generally not recommended to replace the battery of a DJI Mavic Air with individual lithium-ion cells. The Mavic Air’s battery is a complex and carefully designed system that includes multiple cells, a built-in battery management system (BMS), and other components that are designed to work together to provide power to the drone and ensure safe operation. Modifying the battery in any way can pose a serious risk of injury or damage to the drone, and may also void the manufacturer’s warranty.
If you are experiencing issues with the battery on your Mavic Air, we recommend contacting DJI or an authorized DJI repair center for assistance. They will be able to diagnose any problems with the battery and provide recommendations for repair or replacement if necessary.
But if your country doesn’t has any DJI services you can go for it.
I want to know that too ?
I have 3 DJI mavic air batteries from flymore combo and are not charging, they were unused for 5 months may be thats the reason please help me in turning them on. Also please send the code for arduino. Thanks in advance.
Link to the code added in the article please check. Thanks.
Hi,
I have a DJI Mavic Air with 3 batteries mod. PBI2375mAh 11,55V. I haven’t used the drone for 2 years and the batteries allready doesn’t work. I can’t charge them, if I press the button, the green LEDs do not light up.
I need the Arduino code to reset them, can you send me?
Many thanks, Fabio.
long term storage an battery is unresponsive – not a spicy pillow. pls send 1010101
I am in the same boat at Suraj – they were unused for an extended period of time – please help me in turning them on. Also please send the code for arduino. Thanks in advance. happy new year!
added in the article. Share your experience.
hi can u help i need the code for DJI mavic mini BFS reader to clear PF flag due to long storage please.
Hello sire.
I have two sleeping batteries not used for allmost one year. Now both are totally non responsive. Can you help please with the arduino code needed to try to activate them again?
Thank you very much!
Code link and tutorial given in the above article. please check it.
I need the code to unlock my Mavic Air Battery. No swelling.
Also, the link for the Arduino NANO you list above must have changed. https://amzn.to/3pxTUcK goes to a different product.
Arduino NANO in Amazon brings up the same item photo.
Sorry, updated the link for Arduino NANO. And also the link to code is in the article itself.
Hey, need to revive my battery, not swallen.
BR
Mario
Will this work with the phantom 3 batteries? They look very similar.
Hello,
How long should it take? 5 sec? it is stuck there:
***DJI MAVIC AIR BATTERY PF RESET TOOL : CIRCUITSCHOOLS.COM ***
***Visit circuitschools.com for Circuit diagram and tutorial***
***This program will unseal and clearPF automatically for DJI MAVIC AIR***
***If this program helped you please comment on our page***
Unseal/FAS …
It means BMS is not connected to the Arduino NANO.
Reasons: 1.Connection problem, or 2. the voltages in the internal cells are very low.
Solutions:1.Check the wiring, 2.Charge the individual cells upto nearly 3.8v with external lipo chargers with very slow speeds.
First of all thank you for your precious guide.
My uncle gave me his Mavic Air drone that he hasn’t used in the last 2 years and all 3 batteries are gone.
I’m trying to solve with your solution, but I’m stucked on “Unseal/FAS…”.
Checked the wiring; I’m not sure to understand what do you mean with “Charge the individual cells…”, does it mean to try to charge for some hours the batteries with their recharger or that means something else ?
Again, thank you so much !
if the individual cells inside has low voltage then they wont turn on the BMS. So, charging them with external charger slowly will increase the voltage and BMS turns on.
Can you explain how to charge individual cells?
its shown in our youtube video at end, please check.
How long it is suppose to take? it is stuck at unseal/FAS… for ever
is there a way to get info from the battery?
Hello,
What does it means if it is stuck to unseal/FAS, does it means the bms board is dead?
Hi 🙂
Can you share the source code?
I would like to try to adapt it for my DJI FPV drone.
Thank you very much!
The Unseal key doesnt work for FPV drone.
I have an original Ronin gimbal and batteries are not available, so I am looking for a workaround. The battery talks to the gimbal via a signal pair. Do you know what the idea is? Do you know the protocol? Why does the BMS talk to the gimbal?
Will this code work on spark batterys? i love this code couse i used it several times on my mavic air battery but i want to know if it also works on the spark drones, thanks in advance.
did you figure it out already? looking for the same answer 🙂
Not working for mine Spark, stops in “Unseal/FAS …”
Mine too, im using arduino nano, but runing in windows 7,…thats wrong or its not a problem? I olso charged the batteries but they have diferents voltages…like 3.20 v… 3.45v and the other one 3.50v… thats a problem too?
I have the messega unseal/fas too
Worked in Spark after all, was necessary to provide an extra 12v to be possible to unlock…
Hello,
sur mes 3 batteries du Mavic Air Combo, il y en a qu’ une que je ne peux la charger.
Veuillez m’envoyer le code Arduino pour remettre cette batterie en service.
Merci
I bought a mavic air from somebody that has no knowledge of lipo batteries like me turns out it’s useless and I can’t really afford a new battery I have looked all over and this seems like the way to do it
Hello,
I own a DJI Mavic Air 1 which I haven’t used for quite awhile and i was thinking of trying out what you mentioned in your article above.
Would it be possible for you to send me the arduino source code please?
Thanks a lot
Hello,
I have a mavic air that has not been used in a long while and my batteries appear to be locked. I will very much like to try to see if your solution works, and i hope i can get the arduino source code from you.
Thank you.
Is it possible to just an ESP32 for this? I have one on my desk?
Goodnight
I have a mavic air, I haven’t used it in 6 months and the batteries won’t start.
Could you give me the codes?
I thank
Aqui deu certo, muito feliz. OBRIGADO – TkS
Hi Danny here Australia I have 2 x dead Batteries …Please can you send Code …God Bless Danny
Thanks a lot for putting this guide together. Regardless of whether I am going to be able to revive my batteries, I learned a lot!
As others have mentioned here above, I am stuck too at Unseal/FAS… If the batteries are not turning on whatsoever, you still suggest to have these charged using the Mavic charger (not multi-charger I guess), for as long as possible, correct?
You need to charge them with external charger, not through BMS, connect charging voltage directly to battery pins. You need to have good knowledge of Li-Po batteries while doing.
Hello,
sorry for my rough english as it is not my native language.
I have a DJI FPV with 1 battery that has gone into deep sleep. I haven’t used the device in months and the battery has gone into deep hibernation. I can’t reload it. When the button is pressed, the white LEDs do not light up.
I have an Arduino Nano, I read your very well done tutorial, I just need the code to upload to the Arduino. Will it work with DJI FPV?
Could you please send me this code.
Thank you very much
Sincerely
Code is already given in the article, you can use Xloader to upload the code to the Arduino, and run it through Arduino IDE serial monitor.
I have a Ronin 1 battery that needs to be reset. Anything for that?
Hello friend i tried to load your program using xloader, but xloader is stuck and not able to load the program. So can u share the code. I have laptop batteries, also i tried with fx2lp and some other arduino codes but not able to reset PF. I installed new batteries but need to reset PF. So if you allow me i can try with my laptop battery. Thank you
If you are stuck while uploading on Xloader, set the baud rate which we specified in the above article.
Hello, I have same problem with dji fpv battery and looking for solution. Can you send me the your code please?
This doesnt work with FPV batteries.
hello sir
i am wondering if you can help me.. on how to charge the cells of the unit without having to open it up ?
cause i have to how wire another battery to get the code to wipe the lock battery but how do i charge set lock battery as i think the cells are to low
best regards
kyle slabber
south africa
hello sir
i have left a few comments but they never stay long
i final mange to sort out my battery.. i had to open it and charge the battery as it was 2v total got it 11.6v then did the unseal.. everything is working great now charge up .. just need to make the case look nice again as i dont have nice tools to open the case with.
Hi sir
I have 2 mavic air batteries . Not puffed . I have charged the batteries with lipo charger . Now need to clear pf
Please share the code .
Code is already given in the article, you can use Xloader to upload the code to the Arduino, and run it through Arduino IDE serial monitor.
does this work for spark batties as well? Xloader gives the message: Can’t open port. The settings are the same as in your description. Im using a Arduino nano.
does this work for the spark batteries as well? I tried it, with the mentioned settings above, however, I get the message from xloader: can’t open port. I tried it with a arduino nano and uno.
It means that arduino is not connected to your pc. Check in the pc device manager for the ports weither it is connected or not. And this code is not tested with spark batteries, so we are not sure that it works with spark batteries.
Yes, it worked a treat with my Sparkies. I have just successfully used it to do two dead ones. Pinout with batteries facing lights/button up and connector towards you is 1-SCL, 2-GND, 3, 4, 5, 6-SDA
hey, after the Arduino Code tyo reset the flags on my mavic battery.
Code is already given in the article, you can use Xloader to upload the code to the Arduino, and run it through Arduino IDE serial monitor.
Hi, My DJI Mavic Air battery is not working and I am unable to charge it. Please help to share the source code.
I would like to try to make it works again.
Many thanks for your help in advance.
Hello,
Hope you’re doing well.
I own a DJI Mavic Air 1 with two batteries. I haven’t used the device for several months and both batteries have gone into deep hibernation. I can’t reload them. The green LEDs do not light up when the button is pressed. Need guidance and code.
Regards.
At first i thought it’s some kind of a hoax. There was no reaction in the terminal after connecting the battery. The problem was lov voltage on the cells. After charging it worked just like in the above tutorial. Thank you for your work, i don’t currentylky own cp2112 interface but there’s always some arduino laying around.
Brilliant guide thankyou so much. My 3 batteries were all dead. I tried your code and was stuck on the “unseal FAS” step. I was able to charge each of the cells with a TP4056. For a while I was still stuck here – with charged cells still stuck at the unseal stage. To fix this, I plugged the battery back into the standard charger for a couple of minutes. Then, running the arduino code again worked perfectly!!! 🙂
Now I have 3 fixed batteries, and ready to fly again…. thanks again.
Hi,
Thankyou for this information and code.
Will it work on any of the Ronin M/MX batteries?
Thanks
Jack
hi. i buy phantom4 pro. i haven’t used about one year. i need to remove pf error. Many thanks for your help in advance.
best regard
I dusted off my old mavic air to fly with my son just to find that the batteries are stone cold dead. Help please 🙂
Great Solution. Will your Code also work with a Mavic 2 Pro/Zoom battery?
Hi, this procedure works with mavic pro battery? do you have codes for mavic pro batteries? Many thanks in advance.
I have this same question too.
Hi, will this work with mavic pro battery? if yes, can you share code? Thanks
Hey can you make your code working with other arduinos, or send the code?
Does data line work only with 3,3v or with 5v as well?
I have arduino uno laying around, that I’d like to use.
Does this Method work on Mavic Mini battery ??
Hi Please send me the source code as well.
Thx!
Hi, I hace the same problem with my mavic air battery
can i recieve the code please?
Hello, Thanks for the work.
I am stuck with Phantom 4, DJI Spark and Dji Agras BAtteries that are under over storage issue.
Kindly can we cooperate? I am Okay with some coffee..
Regards ,Yiga .
can you share the code, Xloader is having hard time with my different arduino board and cant proceed with mavic air 1 battery reset
Dear Sir …… I have a battery ( mavic air) not accept charging and not output , so If you help I need the arduino code , thank you for your help , my mail ……….. akabood46@gmail.com ( I am from Irag ) ….thank more my name Kadhim aziz.
You blokes are geniuses. I’ve just managed to unlock my 2 dead DJI Spark batteries (drone had been left unused for two years) using the method described on this page (the video wasn’t as much help as your written words) despite never having previously touched an Arduino or anything like it in my life. I spent yesterday charging up the cells (to about 11.2v total) by opening the battery housings hoping it may help get the batteries going but they still would not respond to my DJI charger even when left on it overnight. Today I went to Jaycar (an Aussie electronics shop) and bought the Arduino Nano, then began a sudden and intensive learning experience that included learning how to make my USB port act as COM4, how to download zipped files and unzip them and then how to use Xloader to upload the hex code to the nano. There were lots of little hiccups along the way to resolve by trial and error including when I got stuck at the final hurdle because I didn’t realise that leaving Xloader open on my screen after the upload was preventing the Arduino IDE’s Serial Monitor from getting the battery to respond to the unseal instructions so I was missing that final “Done Unsealing Writing Done” result. After clearing that hurdle it went perfectly and now my two batteries are alive and I can finally fly the drone. Thank you.
Hi Jaguar Dave,
glad to hear that it’s possible to revive the spark batteries; I have 3 here … can you explain me how you have charged the cells up to 11.2v, what have you used ?
thanks in advance,
greetings from Belgium,
Domi.
I stopped using my drone for 1 month and when I wanted to use it the battery was blocked, the model is a mavic 2 zoom
hello , i have charging issue with my mavic air battery,
can i receive the code pls
My DJI Mavic Air batteries have not been used over a year and won’t charge. I tried everything else with no luck.
Can I kindly request the code please
I HAVE THIS PROBLEM WITH THE BATTERY OF MY MAVIC PRO, CAN YOU SEND ME THE CODE. THANKS
Hi, I have a issue when I tried to unseal the battery it stated No FAS can I know what is this error thanks.
I’ve got this: …
Unseal/FAS … NOT FAS
what it means?
helo sir, i have a 3 mavic air 1 battery that sit a long time a go, i hope you will help me, for the code, thank you in advance.
Hi,
Thanks for these great instructions. I have followed them but the code does not execute in IDE. It stops on Unseal/FAS and does not go any further.
Any ideas?
Hi, please provide me with the code to reprogram my Mavic Air batteries. I’ve got two batteries that was left on the farm for more than a year and now they’re both dead.
I’m looking forward to your reply.
Terry van Zyl
Hi! I change cells in the baterry so i need a code to unlock them. Please send me a code
Hi, I’ve got 2x Mavic Air batteries that were left on the farm for too long and now they’re not responding. Will you please supply me with the code as mentioned?
Please send me the code, I’ve one of three battery locked…
Thanks a lot! I have recovered my batteries 🙂
Only one note: to be able to upload the code to an Arduino Pro Mini I had to select a baud rate of 57600. The 115200 did not work, it showed Uploading… and nothing more.
I didn’t use my mavic pro for an year due to moving to another house reason. When I check the battery it become totally dead. I opened the battery plastics and check the power of the cells. They went down to 6 Volts. I’ve tried to increase the voltage using the laboratory power supply connected directly on the cells with the current of 1A and lights on the battery start to show something but it still doesn’t work on dron or AC adapter can’t charge it more. Now the voltage is 12.1V. If you can send me a code I will try with arduino …
Thank you in advance
Dear Sir : I need your help , my 2 battrey of mavic air no output not eccepting charge , that was suddenly ,so I need the the code and password if it is possiple , I am from Iraq .
thanks indeed
what do you mean by ( my Email not published ) , otherwise of you do not like to help , that is yours .
you dont need to send the email, i added the code in the article itself, you can download it directly and use it according to the tutorial.
Hello, I have a DJI Mavic Air. One of my batteries has been in storage for a year and will not turn on or charge. Please send me the code, thank you!
Hey, I havent chargerd my mavic air battery for long time so its not charging, can youy send me the code
Hi my Mavic Air battery was stored to long. I am using Arduno uno
I get Check the connector to CR01, and nothing else in the Serial monitor. I am using UNO.
Do you have response about this alert message? I have the same message
Getting the same output on the Serial monitor using UNO : “Check the Connector to CR01”
hi i get the same…..any ideas?
please send me code for arduino nano thanks
Its already there in the article. please check and download.
Hi the Mavicair pfreset hex is asking for a password so can not download it could you email it me please thanks
Password for Zip file: circuitschools
Thank you very much one battery is now unlocked 2 more to do tomorrow thanks for your programme was very easy
Thanks for sharing. I’m trying to unlock the battery with an Arduino Uno and when I upload the code with the arduino connected to the battery it stops at: “Unseal/FAS…” and doesn’t finish. Could it be because the pin configuration is different from the Arduino Nano to the UNO? I tried it with A4,A5 and with those that have Arduino Uno as SDA and SCL but the same thing happens to me. I think you can’t modify the pins in the .hex file you share. Can you share the .ino file? Perhaps the problem is due to the loads of the cells.
it stopped near Unseal/FAS because the internal cells doesn’t have sufficient voltage to wake the BMS, Please watch the video till end to know how to charge the cells.
Yes Yes Yes!!! I opened the battery and charged the cells one by one and later I managed to unlock it. I have a battery that has one of the three cells at zero volts. This stays at the “Unseal/FAS…” step. I will try to replace that damaged cell (I imagine) to try to make it work. Thanks a lot.
Hola: me podrias proporcionar el codigo? se me bloqueo la bateria. Gracias
Hello, I have gone through everything step by step. The last line after doing the Serial Monitor on my end shows: Unseal/FAS …
Your instructions say that it should say “Done Unsealing” and then Writing. Why am I unable to get it to go past this?
please watch the video till end, on how to charge the cells.
Hi, I want to recover 3 of my mavic air 1 batteries. Is it also possible with an CP2112 in combination with xLoader?
Our code does work with Arduino, which is cheaper than CP2112, better get one and try to recover your batteries.
witam nie moge pobrac pliku ZIP
link do pobrania pliku ZIP w artykule, możesz go pobrać.
witam prosze o Haslo bateria po wymianie ogniwa dzieki
Does this code work with an Arduino Uno?
I uploaded the code, and attached the pins to the same A4 and A5, but the serial monitor is stuck at “Unseal/FAS”…
Hey! wanted to say thanks for the comprehensive and easy-to-follow guide! I followed everything with the exception of using Arduino Uno instead of Nano. The charging of the battery cell using TP4056 is tricky to keep in contact, but it works as you mentioned (I charged all three cells until
approx higher than 3.7v) Thanks for being awesome
Hello
Do you have hex file for ronin m battery?
Hi CircuitSchool,
Thanks a lot for the article!
I thought my batterries are completely died, but hope they are not.
I didn’t use my Mavic Air for several years, so all 3 batteries are just do not react to attempts to charge them – no any led light, the battery charging stations blinks with 2 red lights and one green. I have tried to charge the batteries for several days (tried to charge directly from the adapter as well) hoping they will quit the hibernate mode, but no success and no any signs of life.
Could you kindly send me the code to unblock the batteries?
I cannot charge the battery and it below 12 volts.
Voltage is only 4 volts. I own a DJI Mavic Air. Help me clear the pf
Please send me the code.
I need a code to unlock the Arduino code please I have a locked battery and it is not responding to the battery repair program I think it is locked due to over discharge
Thank you for your instructions. My battery seems to be dead, I would like to recover it with your solution…
I cannot charge the battery and it below 12 volts.
Voltage is only 4 volts. I own a DJI Mavic Air.
Hey how are you ?
Please I want the code for mavic air 2
Please could you send me the Arduino code? I have 3 batteries to revive…. Thank you!!!
Hello, I have a Mavic Air 1 battery that will not charge and no LEDs show up. I have a MAC, and I noticed the software to upload the fix was for PC. Is there any way to do this on a MAC?
Hallo. I have a DJI Mavic Air, and my goods were stored for a long period due to relocation (including battery). Now no response from battery. Please send me the code or link to download. Thank you. Carl
hi, what is NOT FAS?
***Visit circuitschools.com for Circuit diagram and tutorial***
***This program will unseal and clearPF automatically for DJI MAVIC AIR***
***If this program helped you please comment on our page***
Unseal/FAS … NOT FAS
did you manage to solve this?
Hello, my manic batteries have gone into permanent hibernation after a year or so of non-use. Can you please send me the file? The link in the article appears to be broken.
The link is working from our end bro.
Hi,
My phantom 4 battery does not work….single flash and does not chrage after long storage. I hope the same code will work also for it. Can you please email me the code?
??? Can you please reply?
sorry we dont have code for phantom 4.
This worked on two dead Mavic Air batteries for me. I did have to pry them open first and trickle charge them with a TP4056 board first. There is no way to elegantly pry them without scratching them up a bit, but if you don’t break the inner tabs, you should be able to put them back together just fine. You will need a volt meter. The three batteries inside each battery housing need to all be around 3.80 before the Arduino code would execute. This can take a few hours depending on how many batteries you have and how dead they are. Mine were realllly drained. Quit the Xloader app after you upload the code, then open the serial viewer in the Arduino IDE to see the code executing. I am amazed this worked, and happy! Thanks again for this great how-to!
Matthew
TOU COM DUAS BATERIAS SEM SINAL NENHUM. BAIXEI O PROGRAMA PRA REATIVAR ELAS TEM COMO MANDAR O CODIGO
The battery is new, I used it only once, but I stored it for a period of time, and when I wanted to use it again, it did not work, and it also does not charge.
Please send me the code.
Hi,
I have gotten the Xload to work and upload the hex file to the arduino/battery. “4846 bytes uploaded”
But when I open the serial monitor with Arduino IDE (2.1.0) there is no text or dialogue at all. Just the empty screen. I’ve tried with and without closing xloader before opening IDE.
Is there another step needed?
Set the baud rate to 115200
Hi I have 2 faulty Mavic Air batteries that I would like to try you fix on.
Please send code.
Robert
HI,
the Xloader works fine, the upload to my arduino is successful. But when I open serial Monitor there is no response, no text no nothing. Do you have any idea what can be wrong?
The battery was charged with the method at the end of you video
This might help. I usually run Linux but borrowed a windows laptop to get the code onto the nano – I thought I could then just plug the nano into my linux box and clear the BMS from there, but I got nothing on the serial monitor. I moved it all back to the windows box and it had switched com ports so again I didn’t see anything, but switched it back to original USB and it worked fine.
Also you have to kill the Xloader before Arduino IDE can see the com port.
Can i get source code ? working on some similar project for notebook batteries so this can be very usefull. Thanks
I tried but not working for notebooks. even my laptop battery BMS locked, not able check or unlock with this.
Yes I know, that’s why I have ask for source code to try to modify it a bit and add more options to it, maybe even a small python gui …
Thanks to your instructions I was able to revive two of my three Mavic Air batteries! I had to open those two batteries to charge the cells separately to 3.7V beforehand because the Voltage was to low for the internal BMS-Chip to work.
Very helpful for Mac Users may be that its possible to use the preinstalled Terminal App for getting the HEX code to the Arduino Nano (with Chipset CH340) connect via USB: 1. Open Terminal, 2. change your local path of the HEX file (below), 3. copy paste in terminal, 4. hit enter:
/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avrdude -C/Applications/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf -v -patmega328p -carduino -P/dev/cu.usbserial-14120 -b57600 -D -Uflash:w:/Users/YOUR/FILE/PATH/Mavicair_pfreset_circuitschools.hex:i
I get stuck with this text
***DJI MAVIC AIR BATTERY PF RESET TOOL : CIRCUITSCHOOLS.COM ***
***Visit circuitschools.com for Circuit diagram and tutorial***
***This program will unseal and clearPF automatically for DJI MAVIC AIR***
***If this program helped you please comment on our page***
Unseal/FAS …
Tried with different batteris and cables but it does nothing after that.
Brilliant – Thank You! 2 dead batteries that had been in storage for over 3 years fully revived. For info, there wasn’t enough charge to power the BMS so I opened the case. I didn’t like the idea of soldering so close to all that circuitry, so I screwed a couple of screws halfway through a small piece of wood 18mm apart then used rubber bands to connect the wood to the battery. The points of the screws touching back left and front right (looking with the battery pins towards you) and clipped a small 0.5a 12v charger +ve to back left, -ve to front right – a couple of hours later I had 11.5v. I still had to connect back left to one of the +ve battery pins on the case, but I just held it in place while the program ran. Thanks, Pete.
What is the white board / pin board that he plugs everything into called and where can it be ordered?
It is called breadboard, you can order it from here: https://amzn.to/3CcBR16
Hi I have 1 Battery of Mavic Air that was fully charged and stored for 2 months now it is not charging and lights not coming on. Would like to clear the flags. Please share the code with me
hi my dji mavic air battery’s are not working could you please send me the code.
Hi Circuit School:
Can you please send me the code for resetting the PF on a Mavic battery? I don’t really know why it has failed, but it was probably caused by a few months of disuse.
Many thanks for your efforts!
Bill Gibson
Hello,
Two of my Mavic Air batteries no longer charge because I have not used them for several months. I have already reset the PF flag on the BMS. But this did not help. How is the PF flag reset with your code. Can you share your source code with me?
Hi..Thanks for helping us out. I tried to follow the same steps as mentioned in the tutorial and got below results but my battery is still not blinking. I can confirm that battery is charged using external LIPO charger and all 3 cells individually show enough voltage. Please can you guid if we need to follow any additional step?
12:57:06.582 -> ***DJI MAVIC AIR BATTERY CYCLECOUNT RESET TOOL : CIRCUITSCHOOLS.COM ***
12:57:08.543 -> ***Visit circuitschools.com for Circuit diagram and tutorial***
12:57:08.585 -> ***This program will RESET battery cycle count automatically for DJI MAVIC AIR***
12:57:10.562 -> ***If this program helped you please comment on our page***
12:57:13.549 -> Unseal/FAS … Done Unsealing
12:57:14.403 -> Writing…Done
12:57:15.583 -> Thank you.. Battery cycle count reset success and sealed
Hallo
Können Sie mir bitte den Code zum Zurücksetzen einer Mavic AIR-Batterie senden?
Zellen hatten Kurze zeit Unter Spannung. wurden aber wider alle Aufgeldern einzeln auf die richtige Spannung.
Danke Gruß Alex
Hi!
Can you please send me the code for resetting the PF on a Mavic Air battery?
Can’t upload the code via xLoader. Freezes, no upload possible.
Have arduino nano every.
Is it possilble to get the C code.
change the baud rate and try it will work.
Sorry but does not work. Have tried different baud rates (115200 specified in article). No upload happening, Xloader just freezes. Tried downloading again Xloader.
Can’t upload the code to Nano every. Any other solutions ?
Thanks
Hi, I have exactly the same problem. have you found a solution? Thanks
Is the same tool also working on Mavic Pro battery? Or is it possible that I destroy my config or other things?
Hi, will this work for a DJI Ronin M battery?
I have a mavik3 battery. Could you please share the code? I don’t have such an arduino, so I have to change something…
Can you please send me the code. I have a Mavic Air which hasn’t been flown for more then 6 months
Hi,
I’m trying to unlock 2 dead batteries with an arduino mega 2560, the pins seems to be the same.
The download with xloader is ok : 4846 bytes uploaded ; but after that nothing in the monitor :'(
Trying with other baud rates but doesn’t work.
Any chance to get it worked with this arduino ? Could you send me the source code ?
Regards,
Alex
Eu tenho um Mavic air que comprei de segunda mão com 3 baterias. Um funciona, os outros estão mortos, as luzes não aparecerão.
As baterias não estão inchadas.
Eu gostaria de tentar sua correção, por favor me envie o código.
Obrigado pela informação.
Hi,
I have a Mavic 2 Zoom and one battery does not work correctly. It is fully charged, it gives power, I can even see the picture from the camera on my screen, I can zoom and move the camera, but the remote control does not receive any information about the battery. The remote control thinks that the battery is empty and refuses to lift off. Can your program help me?
Hello, can i have the Code, 2 of my batterys don´t work thx
Hi. From the responses above, it seems like great work you’ve done here. I’ve got a second-hand Mavic Air 1 and the battery is dead weight right now.
Could you please send me the source so I can attempt to revive it?
Cheers.
Hello, can you send the code for ESP8266?
Kind regards,
Mark
Hello,
You can help me ? I need code.
I have 2 battery frozen for my air 2s.
Hello,
I have already plenty of DJI bateries with an LED blinking and the Mavic doesn’t want to recognize it.
Could I, please, get access to the code of your program.
In case it costs something, then, please, tell me the price and the preferred payment method.
Thank you in advance.
i have 3 batteries locked because of 3 years of inactivity and not touching them
Is it possible to get the source code for this instead of the .hex file?
I want to get this to run on a different board. Thanks
hello, please write me the code. I have the battery too much final charge have it again manually charged goes again (the cells were at 2.3v) bms is disabled
How long does it take to charge each cell to 3.9v using the TP 4096?
Hi.
For some reason I can’t download the hex. Can you please help. This is for mavic air batteries that sat too long without charge. Thank you!
Hello Grand Master
Did it Battery is charging again!
This package is awesome can recommend it 100%
Thanks
14.08.2023
Hi
Is it possible to activate phantom 3 battery?
Thx
When i try to upload de HEX with xLoader stucks on Uploading….i cannot finish the process
I have 3 batteries that i didnt use in 2 years. I need if you can share the code to my email to upload with IDE. Please.
Thanks
Hi, cannot upload with xloader, could you send me the code please ?
Thank’s in advance.
Malo
I just can’t get the xloader to work. Keep stuck in uploading…
Follow all the instructions, check the baud rate, etc.
Using arduino nano with atmega328 chip.
Is there any other alternative to upload the hex file?
Can you share the code?
I have 2 Mavic Pro batteries dead and last night spent almost 4 hours trying to get the xloader to work without success.
Hi!
Greetings from Romania!!!
I have a Mavic Air, which hasn’t been turned on for a while, and now the battery is dead. I opened it, the cells are in parameters after charging but the battery does not respond in any way… You are my last hope!
Thanks in advance.
hi I can figure thu out and ordered the 2 parts from amazon, what about yhe whit board them usb programing boad is plugged into…. can I connect wires to battery without it?
yes you can connect wires directly according to the circuit diagram without breadboard.
please send me the code.Bought a mavic air fly more combo.One battery flat/ wont change/ idle 2 long.Thanks
Hello, could you please share the code t me, I’d like to port to my board which is not an arduino nano.
Many thnks in any case.
Thanks for the code, worked great.
I found that after manually charging the cells to 3.75, it would not work. I put it on the dji charger for a few seconds, no lights since it was still locked, then tried again and it worked.
Hi Mate,
First and foremost, thank you for sharing this!!!
I am going to give this a crack, and see if I can get it working for a Mavic Mini 1 battery, and an Mavic Mini 2 battery.
Do you have any tips or recommendations / things NOT to try?
Cheers!
Hi Mate,
Is it possible to use this for a Mavic Mini/Mini 2?