I have quite strange battery behavior on my iPod 80GB.
First, while charging using wall charger with Rockbox loaded, the charge indicator switches randomly to the current battery percentage (as if player weren't plugged to the wall) and back to "charging" label. With OF everything is OK.
Second, lifetime is very small comparing with corresponding data in the Wiki (about 5-6 hours with 192-256 mp3 and 4 hours with level 8 FLAC).
Last, but not least, the battery_bench log is very very strange (you can see here: http://rafb.net/p/xkFSSw27.html
). That log is from ~60% to 0% (power off).
Thanks for the help and sorry for bad English. Hope you'll understand