I have been a BIG fan of the SBC kernels, but here is what I have come to discover. The SBC kernel is only really good after initial charge when the phone is sitting still. I've sat at 100% for 3hrs. before...BUT once you start heavily using the phone...it drops at a high rate of speed. Seems much quicker than regular kernels, so I guess you need to decide which end of the batt cycle you'd prefer.
Yep, that's exactly what I observed. It stays as 100% longer, but drops at a much faster rate than before using SBC. As far as how "dangerous" they are, it seems unlikely that it will cause your phone to explode, but we probably won't know for several more months whether or not it decreases the life of the battery. I guess we'll see.
i also have observed this as well. now this was a while back when i first rooted my phone and sbc kernels and the debate about them first started. i will have to try some of the new sbc kernels that are out there and see if this is still the case.