>My old Ti 400 hardly holds any charge - it's now 2 years old (time >flies) and i think I might get an hour of light use before it karks >it. And yes, it loses power if it sleeps a lot...Time to replace I >think > After two years by Ti 400 battery got to the point where minutes and % were interchangeable - a 100% charge battery would claim to last about 100 minutes, but would often take a nosedive when partially discharged. Spending $129 on a new battery was like giving the poor old TiBook a new lease of life though - money well spent, espcecilly if you are considering selling any time soon. Paul --