The jump-starter boxes have been around for a while and having jumped my share of cars and trucks I never really thought they would work that well with a battery half to a third the size of a car battery. So when my sister gave me one for Christmas ...... oh.....that’s nice thanks her son is a motor head racing stock cars so I bet he had an influence on the gift. So I opened it up and charged it and noticed it has a accessory cigar lighter outlet with compressor and I thought it may work for ham gear so once charged I hooked it up to a 2 meter radio via the heavier clamps and worked a few local contacts for 2 hours last night while charging an HT from the outlet. This morning the guy next door asked for a jump on his POS truck again so I used the jump-starter and the truck started on the first crank. Looks like I underestimated the value of of this tool for starting vehicles and use as a portable 12 volt power station.