I know I've seen other people mention these same symptoms but they've all been new(ish) batteries under warranty, so DJI swaps them out for a new battery. I have one battery that performed completely normal during a flight. Re-charged normally, LED indicators show full. Put in drone and boot up, instantly get warning messages on screen that it "cannot take off" and voltage is only sufficient to land, etc. Voltage displayed on screen shows 0.0v. If I pop into the battery tab under settings in DJI Go 4 it shows no information at all, no charge history, no cell voltage, etc. Unfortunately, this battery is more than 6 months old, so technically out of warranty.
It seems obvious to me that it's a communication issue, cells are charged, just not communicating with the drone. Battery is physically pristine, no swelling, no faults with terminals. Carefully cleaned and detailed each contact on both drone and battery, no change. All other batteries work fine. Can charge/discharge the battery on the battery charger. No other oddities such as blink error codes on battery's LED indicators.
Thoughts?
It seems obvious to me that it's a communication issue, cells are charged, just not communicating with the drone. Battery is physically pristine, no swelling, no faults with terminals. Carefully cleaned and detailed each contact on both drone and battery, no change. All other batteries work fine. Can charge/discharge the battery on the battery charger. No other oddities such as blink error codes on battery's LED indicators.
Thoughts?