The plates can overheat, and if its not vented properly it will explode
Jeff, I know what you mean but not all car chargers are the same. I have a choice of charging for a fast charge at 13 amps, or charging overnight at 2 amps. I charge my leisure battery at 2 amps. This drops off to zero when the battery is fully charged.
I have been given a big charger that is designed for mobility scooter gel batteries. I havn't used it yet as I'm not sure it would be suitable for leisure batteries.
Does any one know if you can charge leisure batteries with these? Dai