Recharge NOCO Boost X UltraSafe Lithium Jump Starters from a vehicles 12-volt power source. Compatible with NOCO Boost X UltraSafe Lithium Jump Starter models GBX45, GBX55, GBX75, and GBX155. GBX Fast Charge compatibility charges Boost X models within a couple hours thanks to 65W USB-C power delivery. Built-in USB-C protection for increased safety. Molded strain reliefs prevent unwanted strain on the GBC011 wire connections.