[michaelsanford]

Thanks for the reply. How shameful, I had no idea that you could reset the PMU.

I've done so, and now my iBook is communicating with the battery, but it refuses to charge it (menuitem reports "Battery is not charging"). If I leave my iBook unplugged for more than 10 seconds, my clock resets

Here's what System Profiler has to say

 Charge Information:
  Charge remaining (mAh):	435
  Charging:	No
  Full charge capacity (mAh):	581
  Health Information:
  Cycle count:	179
  Battery Installed:	Yes
  Amperage (mA):	0
  Voltage (mV):	16839