I've been rooted for 2 months now and I just recently (2 days ago) switched to Lithiummod. If I recall correctly I went with the low voltage 1.0 GHz kernel when prompted in Rom Manager.
This morning I woke up (after a night of charging) to my battery 40% charged. I had it charging all day at work and watched as, to my dismay, my battery continued to deplete. I tried switching to the standard voltage 1.0 GHz kernel but that didn't seem to do anything. I also restored back to the cyanogenmod 6.0 RC2 I was running last week (without any battery problems) and at that point my battery finally died (all while still being plugged into the charger).
I have a feeling that this has something to do with an incompatibility between the phone and the kernel I downloaded, but I'm also somewhat inexperienced so that's purely amateur speculation. Any thoughts, input, advice? At this point I can't even get my phone to turn on.