Hi, Just got a TC1100, battery would barley hold a charge. I replaced the cells with Lithium Polymer cells that I got from www.batteryspace.com. There's a bit of extra space in there, it's not a perfect fit for the original cells. It charges fine though and my battery life right now is 3 hours+ under normal usage, not sure what the normal battery life is on this. I thought about looking up the part numbers of the original cells to figure out what the nominal Ah rating of original cells was, but I'd already thrown in them in my battery recyling bin and I'm not sure which ones they are! Anyway, I've done 100s of such repair jobs. I'm a bit busy now and it's not worth my time to buy broken laptops and refurbish them anymore, but if anyone here is interested in some semi-detailed directions I could do a write up. Not going to spend the time if no one is interested though. EDIT: Battery life is better than I thought, I got a little over five hours yesterday. These must have been sitting in stock for awhile and self discharged.. very happy now though, I was kind of let down when I only got 3 hours.