Comment 7 for bug 294021

I confirm this problem exists in Jaunty, latest kernel (as of July 2, 2009) 2.6.28-13-generic.

My laptop - Toshiba Tecra M4 - with primary battery and media bay 2nd battery. Both batteries are detected at first. After running on battery for some time, one battery gets drained until total battery life is ~40-50% remaining. Then suddenly it jumps to 2% remaining and shuts down. Then when I restart, only one battery is detected. I must physically remove and re-insert the other battery before it is detected again. It seems to be the secondary (media bay) battery that drains first, and the primary battery is never used, and often becomes undetected, although I can't be sure this is always the case.

Either way, this is a serious problem for anyone with dual batteries. It cuts my battery life in half or worse. I don't know what other information I can supply to diagnose the issue, but I'm willing to do what I can.