UK Battery suppliers?

[zRedbullz]

I'm looking for an aftermarket battery for my powerbook G4. I'm reluctant to pay £89.99 for a genuine Apple one.

Does anyone recommend any good online stores that sell such batteries? Are aftermarket batteries worth it?

Thanks

 

[i-battery]

Maybe this reply is too late, , You can find this product at here:
http://www.i-battery.co.uk/laptop-battery/IB600AMN.html