So I have Froyo installed, got everything backed up, and I'm ready to start playing with kernels (I don't like the 800 that comes with it, battery hog). So, I go and download one of jdflg LV Kernels. Back up my current config (thank the lord) and flash the new kernel. I was sitting at about 20 % battery, but I figured, quick flash and then plug it in, I tend to flash with the power plugged in anyways. Flash the kernel and reboot, battery comes up with a red slash through it, and the phone won't charge!!!!! I'm like, "This ain't good!" Do a couple more reboots, try USB vs power adapter and nothing. I'm afraid to roll back because my battery is so low, and it doesn't seem to charge with this Kernel, so the phone boots (because of low battery) and then doesn't turn back on. I happen to notice that the little charging light is on, so I decide to leave it like that for 30 minutes. Come back 30 minutes later, start the phone back up, same thing. SH!T is what I say and decide, I have to roll back, luckily I had enough battery to roll back to my backup and now the phone is charging away. Sooooo, moral of the store, don't flash unless you battery is very full, AND always and I mean ALWAYS take a backup first!