is that so? i never experienced that on stock... maybe because i don't stay on stock kernel that long..its normal for the not to flicker when battery is at 2 or 3 percent. happens on stock kernel as well. I don't know of it will really solve you issue.
either way, my hydracore kernel is outdated and i plan on trying this kernel since i loved cfroot (its my very first rooted kernel on s2) and mainly because this kernel is SO popular,,,
thanks for the heads up...