Battery led flashes 3 times-off repeats

[MichaelMcG]

I left my P3Pro batteries too long before charging, with the result that they wouldn't charge again. So today I used DJI BatteryKiller to unseal, clear the lock, and reseal. Everything else looked to be ok, as in no errors or warnings. But now when trying to charge, the first green led flashes 3 times, along with a steady red led, then all go off before doing the same thing repeatedly. So I'm just going to cut to the chase - is the battery stuffed?

 

[Daniel NZDF]

Hello, @MichaelMcG, it looks like your battery may have a bad 3rd cell. It might unfortunately be stuffed now. You can get aftermarket batteries here: DJI phantom 3 battery on Ebay Hope this helps!