I sent my Advent off to be fixed on contract with PC World and when I got it back it was minus all cables but also the battery pack. I eventually got the cables but the battery was lost by DHL who refused to refund it unless PC World put in a claim. Surprise surprise, they refused to do so. Now I'm wondering if any of these battery packs are available cheap. Help!

ebay or partmaster - id be taking it further though.

I gave up trying in the end. I must've called DHL six times, at about 15 mins per call, no one took responsibility, and neither would the firm that had it originally. Ebay looks promising although the pics don't look like the same unit but they state they are compatible.