I have a contract on a Jefferson 50ft MY. The boat has four 4D AGM batteries under the seat of the dinette for the inverter. They are bulging a little but worked well during a 4-5 survey. I suspect I will be buying new ones soon. There are no dates on the batteries. My question is whether or not that is a safe spot inside a wooden bench seat. The boat has very little space in the engine room despite its size.I'm planning to continue to buy new AGM after getting the boat home.Any thoughts on the safety of the location.OB