Found this when having a clear out. Came from a broken Advent 7091 which I stripped down and sold for parts a few months ago.. forgot about the battery until now.
Works fine, just has a few scuffs but nothing major. Asking £10 + postage, which I estimate to be £3.50. If it comes to any less, I'll refund the different. If it comes to more - I'll cover it!
Pics in post #1