Well that's another good reason I'm sticking to my "old" Futaba crystal gear. (To go along with Cheap and Frugal).

Everything I fly anymore has 4 cell 1450 mAh NiMH packs. On my quarter scale Ultimate I have two and a failsafe battery combiner (Batshare from www.smart-fly.com).

I check my batteries before, between flights and after at home with a loaded voltmeter and cycle them with a Triton every few months to make sure they are holding up.

A dead-stick from a conked out engine is an inconvenience. A conked out flight battery is always a crash. I'd bet 85% of the folks who claim they were "hit" had a battery or voltage related problem istead.