yesterday I have a strange crash. Quad was hovering (in stabilize mode) and suddenly began to oscillate and droped down. Battery was charged.
Before it flew very well (in stabilize and alt hold). Why does it happened?
P.S. After all, I saw what battery was little bit swollen (one cell).
PP.S Sorry for my bad english :)
Board - APM1 (with 2.6 soft)
Frame - custom
Motors - DT750
Props - 12x4.5
ESC - SS 25A
Batt - 5000mAh 3S