This video will show you how to charge two batteries using one deltran battery charger junior. If the two batteries are exly the same make and model and state of discharge, you can charge two at the same time, but if they are different batteries, you can only charge one battery at a time. \rbr\rbrAnd Ive also shown a way to make a quick disconnect plug from common household items so that you can easily yank and go and not worry about damaging your connector on your battery tender.\rbr\rbrThe battery tender connectors are made of a soft metal it seems, and if you remove and disconnect the battery as often as I do, there is the possibility of wearing it out.\rbr\rbrNot including stuff that I have lying around this build cost only 85 cents.