Originally Posted by Roadrunner
... Can I add another battery without putting in another door? Would it need to be vented?...
-even sealed agms needed to be vented to the outside.
but the 2nd OUTSIDE access door isn't required.
-a 2nd "sealed with a lid" battery box can be added right next 2 the oem box...
with a duct/conduit running INTO the oem box, which then vents outside.
assuming u plan to use 12v
cells wired in parallel, the wires 2/from the charger need to be ~equal lengths
and the BOTH batteries should be the same age/rating/design/size and so on...