I understand, but I lost my favorite plane because of a single battery failure. Running a 100 Saito. Of course it was a nimh that I charged before flying and it read full charge before takeoff. Charged it again after crash and it read full for about 1/2 hour, then it crapped out. I guess I'm just leary now. However, I can honestly say that is the only battery in lots of planes and lots of years that has ever failed.