Onboard Battery Charger and Aux Battery

Here is an onboard Battery Charger that I installed last summer.  It a great trickle charger for both batteries for when my Van sits unused for weeks at a time.  I've mounted mine below the sink, against the forward wall.  Go Westy sells these units but I found one locally at a Marine Supply Store.

 Also, here is the battery that I found through a local Auto Parts Supply shop.  As described on the unit itself, It's of the sealed Lead Acid, 45Amp Hr. variety.