I got a free heavy duty battery from my buddy who is a lineman for a cable company. The battery says it must be vented when charging. I was hoping to use this waterproof tool box. I bought this fitting from Lowes to route the wire (10-2 with ground) from inside the trailer and from the truck (10 gauge) thru to the battery. I was going to drill a hole in the back of the tool box and mount the fitting so It points down. With the wires running thru the fitting there won't be much of a vent.
How much venting is required while charging? Would this work or will the hole works overheat? Do I leave the lid open? I want to mount this on my tongue