I run 700cca in ours
Stay away from the calcium type,our old charging systems are not made for them.
Old fashioned wet type will do
Also have to say into the 7th year on ours.
LEDs for lighting in the back and the interior fans are usb.
Also always have the powerall jump pac with us as well(just in case)the larger version easy starts her up.

Cheers Kiwivan