Mavic air Battery
- Thread starter Rwebdaddy
- Start date
The Phantom 2 is older technology so it may have worked then. I have worked on P4, Mavic Pro and Mavic Air batteries and the electronics disable charging if voltage is too low. People are welcome to try the reset but it won't work unless you have the software to reset the error flag in battery management system circuitry. This software exists but is not cheap.
Thanks Detrilago and everybody else who offered advice. Hacking the firmware is beyond the scope of my capabilities, especially on a chip of that tiny size so I guess that 3 x new batteries are required and, in future, I'll charge up once every 2 months!
But because the batteries are useless unless fixed, I'll carefully try manually charging each of the 3 cells individually up to 3.4v and see what transpires. Nothing to lose!
But because the batteries are useless unless fixed, I'll carefully try manually charging each of the 3 cells individually up to 3.4v and see what transpires. Nothing to lose!
This looks what I need, amazing. I looked at the spec sheet but the charger attachment for the Mavic is not supplied, and it’s not a prescribed accessory, which is a swizz as it shows it on the website, charging a Mavic battery.
Do you know what connector the charger needs for the Mavic? I was going to look for one on Amazon.
Thanks
I just searched 'Mavic Air charge cable' on AliExpress..amazon must have something too..but just remember this wont work if the chip is locked.
US $3.07 |Adapter Charging Cable Line Balance Converting Fast Transfer Plug Drone Accessories Fast Charging line For DJI Mavic Air|Drone Cables| - AliExpress
Smarter Shopping, Better Living! Aliexpress.com
www.aliexpress.com
I have opened up the other 2 dud-batteries and they all read approximately the same as the first as posted earlier above:
Cell 1: 3.7 v
Cell 2: 1.9v
Cell 3: 0.01v
Cell 1: 3.7 v
Cell 2: 1.9v
Cell 3: 0.01v
Seems like a defective batch if that's the case. If only this was caught when in warranty coverage.
Ynksfan27
Well-Known Member
What the heck are you even talking about? Seems to be your problem and nobody else’s on here?
I just searched 'Mavic Air charge cable' on AliExpress..amazon must have something too..but just remember this wont work if the chip is locked.
US $3.07 |Adapter Charging Cable Line Balance Converting Fast Transfer Plug Drone Accessories Fast Charging line For DJI Mavic Air|Drone Cables| - AliExpress
Smarter Shopping, Better Living! Aliexpress.com
Chip locked?
Oh dear. I didn’t know about this? I thought they would just be ‘hibernating’ as DJI called it?
What, May I ask, causes the chip to lock, and can this be rectified?
It is part of the battery management system. The battery has a small chip that monitors the voltage of each cell, the charge/discharge current, temperature, etc.. This chip also controls when the battery will be shut down (if you run the drone to nothing).
In addition to all of these parameters the chip also monitors for flags that disable the battery. One of these flags is if any cell drops below a specified voltage that is deemed to cause damage to Li-ion cells or may indicate an issue with the cell. This flag will cause the charging circuitry to be disabled as a precaution.
If you have the right software and are able to hack-into the data lines for the IC you can reset this flag in a similar fashion to that shown in the video above. This is a fairly technical task and would require some time and investigation.
In addition to all of these parameters the chip also monitors for flags that disable the battery. One of these flags is if any cell drops below a specified voltage that is deemed to cause damage to Li-ion cells or may indicate an issue with the cell. This flag will cause the charging circuitry to be disabled as a precaution.
If you have the right software and are able to hack-into the data lines for the IC you can reset this flag in a similar fashion to that shown in the video above. This is a fairly technical task and would require some time and investigation.
