i recently bought a battery from a company on eBay for a 12" iBook Dual USB. it was described to be in "very good condition," but im having problems with it and i wanted to bring it here before i complain to the seller. i first put it in my ibook and charged it for a good 6 hours, then when i checked it, it was fully charged (99%). i unplugged the AC adapter and it was working great for the first 5 minutes, saying that there is over 2 hours of charge remaining. that steadily declined to abouot 2 hours when my iBook just shut off (went to sleep). and i tried re-awakening it and i had to plug it back in in order to bring it back. then it said that there was NO charge. very strange behavior... i have the battery that came with the iBook and it's dead, but it does not say it's okay, then immediately die; the battery quickly declines in percentage from 100% to 8% in 15 minutes then alerts me that it's running on reserve power, then dies. please help me figure out if this is an actual problem with just the battery, or if there actually is a difference on how the battery works from an M8403 (original) battery to an A1008 (replacement).