John, I have one of those electrics on my gas can and one in my flight box just in case my old stand by flight box pump goes out. I bought it used 15 years ago in another flight box that also had my power panel installed. I have a burnt out battery in my new flight box so for the last couple of years I use a car jumper to power my starter and have two wires that go to the power panel to operate my pump. I did go to Harbor Freight looking for those 18 volt batteries for my starter but they didn't have any in stock at the time. I may down size my flight box in the future and just go to the hand pump and glow stick but for now my rolling box is loaded with STUFF. I need the STUFF so I always have the box and the panel is installed in it. I'm the guy that everyone comes to when they need STUFF they don't happen to have. I'm at that point in time down sizing may be a good option. Until I do that the power panel is with me, not really needed at all but it does come in handy during the cold season.
Gene