Took the battery to local recycling centre.Damage to roof was s broken tile just pleased it didn't hit any of us in the garden.Will try to attach picture of battery from my phone. No sign of leaks in fact the battery still switched on with no visible leaks.Sounds good, what is the requirement there for that? It would be interesting if you had a pics of the battery that you could share with us. Also, was there any damage to your roof? It would seem that the terminal velocity would have been huge and could have punched a hole or caused a leak possibly. Quite the high density projectile, LOL. You didn't describe what was visible inside, if anything. Could you count the cells, were they damaged as far as you could tell?