Whether you need power while camping in a tent or trailer, or looking for a reliable emergency power supply, the Goal Zero Yeti 400 Portable Power Station helps you keep all your essential devices charged up and ready. 400Wh, 33Ah (12V) Battery capacity. Chainable and replaceable sealed lead-acid AGM battery weighing 29 lbs. Numerous powering options including two USB ports, two AC outlets and 12V output. Numerous powering options including two USB ports, two AC outlets and 12V output. Recharge from the sun by connecting a compatible solar panel Plug it into the wall. Fully recharges in about 5 hours. Recharge from your car 12V adapter in about 13 hours.