@Wayne-TP , 1. Did not happen lately. Just a few weeks ago and at that time the battery was around 80% charged. 2. It was performing kind of auto calibaration with no reason. Multiple times a day.

@Wayne-TP , It spins with no reason. Battery went to zero and it stopped. It happenned a few days ago. I've fully charged it and now, for the last 2 days, it stays at 100 %. I've reduced the...

@Wayne-TP , C660 KIT, S/N: 225C19AA01490 EU/1.0 Firmware: 1.1.7 Build 251226 Rel. 53177n

Hello This happens to mine too. Battery from 80% went to 40 and now from 40 went to null...or anyway turned off. Please do something. Thanks