Can't take the l.e.d.s out though!
After testing the battery at 11.2v and trying it on the bike to get a very poor clicky sound I have admitted defeat and am filling up the new one on Weazelz advise. The old one had 11 hours of charge so I think it's had it.
Might as well own shares in Yuasa!
Bet you're not Weazelz!