T60 battery

[JerzeeDevil]

How much longer than a 6 will a 9 cell T60 battery last, everything else being equal?

[Brian10161]

About 50% longer if everything stays the same. At least mine does. I went from a 2 year old 6 cell to a new aftermarket 9 cell and I get about 6 - 7 hours. With the 6 cell, I was getting about 4 hours.

CPU is clocked back, brightness is 4 out of 7, Wifi on, SSD, mild internet browsing.