way back when sbc came out, "
suposedly there were reports of this happening. the threads i saw linked a few incidents in china, but i doubt they were on sbc kernels. i think it was more of those bad chinese batteries that you can get from ebay. i have yet to see any verified accounts that sbc kernels cause your batter to exploded.
here this is a great thread that debated it.
http://androidforums.com/evo-4g-all-things-root/319636-sbc-no-sbc-kernel.html. read post#18 by novox77.
if anything what sbc kernels may do is make your battery go out faster then normal. but that could take a few years before that happens and by then you will most likely move on to a different phone. if anything you can get batteries cheap these days.