At 19:25 -0400 8/24/03, Chris Malanga wrote: >Hi all... Have a TiBook 550 Mhz... About 18 months old. Wondering what the >battery life should be. ...//... I get about an hour. With Li-Ion batteries, the end-of-life is signalled by shorter and shorter operational times on full charge. After about 2y, I had to replace the battery on my Ti-500, as I was getting less and less time on a charged battery; in the end, only about 15 or 30 minutes.... The fully-charged battery now gives me between 2h45 and 4 h, depending on the software running, and how I set the Energy Saver. Newer batteries have higher capacities that the original ones. If you are getting just 1 h now you, will be soon down to 45 minutes, then 30 min, then 15 min..... T.