Battery and electrical problems Bailey Ranger

AidanLesley

Hi first year caravanning with a bailey ranger 540/6 . Think I sulphated the battery on the last time out , disconnected it and I'm sure that  has something to do with my truma ultraheater and water heater not working off EHU now. Any way I am replacing
the battery and thinking about buying a  Numax 12v 74AH . Does this sound ok , i dont have a mover.