I have Toshiba Portege M205-s810 with XP Tablet edition sp2 running on it.
The computer is several years old and I still use the original battery. I
bought the computer in 2004. I know that the battery is not what is was and
its overall life has diminished. I get approximately 0:40 use out of it with
the Toshiba power saver settings. I am fine with this as I do not want or
need to shell out $100+ for a new battery.

The problem I am having is that the XP Power Meter is reading incorrectly.
After a full charge, it reads 100%. 0:06 later it reads 95% and so forth.
It stays like this for 0:40 (65%) till it suddenly changes to 1% and
hibernates. Why would it do that and can I fix this?