OK, I came to Amazon hoping to just buy a replacement battery for my DSC-P1 and found that everyone here has the same problem I had. So I took someones advice below and set out to drain the battery before the InfoLithium computer kicked in and stopped my fun. What I found though is that resetting the battery is a lot easier.I took about 15 pictures before the battery indicator appeared. I then realized that I was taking huge pictures and running out of memory stick space, so I paused. The battery indicator kicked in and showed 80 minutes. As I took more pictures and connected the camera to my Mac for awhile, the indicator showed nominal battery drainage and seems to be back in sync. This was a battery that seemed to be unable to hold a charge for more than three or four photos, with or without flash.
So before giving up on your battery, try a quick refresh! I gave this 3 stars because its lame that the problem kept me from using this camera for more than a year, but it was easily fixed once I knew what to do.
