Good second battery?

[suicideneil]

Not in the UK- if you do find them for sale on ebay buy importers, they pretty much double or triple the price from what I've seen. You are much better off £ wise buying direct from hobbycity- sign up to the site and you should see a slightly discounted price, and can specify the price on the shipping label to avoid customs charges

That lipo should be fine though, they are very impressive packs if you dont push them insanely hard- good for practice and general bashing for sure. If the 30c packs fit, those would be even better, but the 25c ones are accurately rated from whnat peope report.