Accessories Cradle + second battery -

[steve_f]

Worth a shot i reckon:

Modern-Tech Dual Desktop Cradle: Amazon.co.uk: Electronics

I don't expect the battery to be any better than the stock one, but nice to have a second one.

 

[mrbillyuk]

I have one of those cradles , bought it off ebay not amazon , Just sent it back , the spare battery sits in a slot behind the phone . It's a poor design and most of the time it didn't charge the second battery .
Also bought a couple of spare 16000mAH off ebay .