
I mounted an Optima sealed AGM batttery in ny galley. It is my understanding that this battery is will not leak or outgas unless I severly over charge it.
To that end, I also mounted a Deltran charger. This is a multi-stage voltage regulated charger that will not overcharge my battery.
At the time, I read several posts here that made me wonder if I wasted my money buying an expensive battery and charger. After a year and a half-dozen trips, my electrical system functions OK. The battery has not leaked and I have had no exposions. We've camped up to one week without rechargng.