That's if it is the battery, its a long distance guess.
As an aside, i had to replace the battery in my car yesterday, (replaced with slightly wrong type two months ago) It suddenly completely failed, with a warm engine,i was in the middle of a series of journeys, and the engine had started seconds before with no problem at all.
The battery was toast, it woud have been pointless to attempt a recharge. The car wouldn't start with jump leads to another vehicle with the knackered battery in situ, (but did start via jumpleads with my battery removed) The short circuit in the battery was draining the available power form the donor vehicle battery, i'd suggest the same scenario would have occured if i'd attempted to charge the battery.
I don't mean to worry you, but charging it may not be a good idea,if the plates have collapsed inside,you could be cooking a potentially lethal bomb there my friend!
Remember to remove the caps from the top of the cells, that the cells are full of de-ionised water,and to leave the battery to stand for an hour or so after charging before attempting to move it, or fit it to the bongo...
Please remember to switch off the charger at the wall before removing the croc clips to the battery terminals, the resulting spark could ignite the vapours that eminate from the open cells. (always look on the bright side of life eh?

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