Battery won't charge

[ericole]

I have four batteries - none that have really had many charges to them - on an original Mavic Pro. One of the batteries, bought new online a couple of years ago, simply will not charge anymore. No lights, nothing. Is there a way to potentially "reset" the battery? There is no way it has been used too much because I don't fly alot. But I have kept the batteries always in a charged state. But this one seems to have died. that would be sad if true.

 

[slup]

Your Mavic Pro batteries will go over several discharging steps over time if not used regularly...

1. The BMS in the battery will auto discharge the battery below 65% if not used during a 10 days period.
2. The LiPo cells in the battery will slowly self discharge.
3. The self discharge make eventually the BMS to activate a "Hibernation mode" (the BMS will mainly deactivate itself to slow down the discharge, trying to prevent the cells to discharge into damaging low voltages, this hibernation mode can be deactivated by just charging the battery).
4. The self discharge continues... & eventually the cell voltages reaches below 3,0V & a serious damaging degradation starts.

A DJI LiPo battery that have reached very low voltage levels can be revived with special equipment & a really low charge amperage... but the damage that already have occurred will remain & make the battery very, very unreliable.

Your batteries are very likely dead I'm afraid...

In this short thread below, you can read more about the special equipment needed... but pay extra attention to post #3 there, describing the permanent damage on batteries that have been allowed to fall below 3.0V... & the risks connected to reviving them for further use.

DJI Mavi Pro battery reset using CP2112 and DJI battery killer

 

[ericole]

thanks for info; that sounds unfortunate

 

[msinger]

I have kept the batteries always in a charged state

How often did you charge them?