On Saturday, June 14, 2014 6:39:13 PM UTC-4, Marcin S wrote:
The battery and charger are made by tenergy. I got it January of last year and the battery started to fail at the end of last season.

Most recently, the battery voltage goes down to 5 volts under 1 amp load.

I called temergy and they told me the pcb is bad.

This failed PCB is the component that protects the battery from other (very) bad things? Is flying with a half-broken LiPo battery different than flying with a Tost hook that has only one broken spring?