This is the battery that could save the day. The Dometic PLB40 Portable Lithium Battery holds enough power on just one charge to give you electricity for a weekend. You want this off-the-grid battery with you when you head out into the wilderness for a while. You can stock up on food because this portable battery will keep your cooler going for days. And this 40 Ah battery will keep any other 12-volt appliances you use going. Along with 12-volt charging, you can use this weekend-long battery to charge via solar power and AC. Plus, this battery is rugged enough to withstand tough outdoor conditions, including high and low temperatures. Take this with you to your next remote location so you always have backup power.