Segio, did you check to see what faults were present on this battery? I have been abusing my smart batteries like you wouldn't believe trying to break them and have yet to come across a dead cell. My batteries average at least 6-10 faults each over time w/ 80-120 use cycles. Overheat is the majority...

You certainly can but not sure if it will fit under the spinner cone as is but with some careful work with a rotary tool you could trim it to fit. Look for an "electric" type wood prop that is the same pitch and diameter. I personally prefer Falcon props but Xoar are great too.