Getting a spare battery for a 12" Powerbook G4 867mhz

[Fredstar]

Hey there guys,
My battery life for the above laptop isn't bad at all at about 2-2.5 hours but that is with the longest battery life settings, v dimmed screen, 3 apps open.
I would like to get a New battery, would the 12" ones on the Apple website work with this model? Is there a reseller in the Uk that sells new ones? Are there other brand ones that work and are better?
thanks and would appreciate your replies

 

[Fredstar]

Please anyone?
Can the 12" Powerbook batteries on the website, ie http://store.apple.com/Apple/WebObj...vUWJ03lQVB6nd68Wqiwe/1.0.11.1.0.6.25.7.11.2.3 ,
be used in my rev a 12" G4 867mhz pbook??