Never stranded again... Antigravity Batteries "RE-START (RS)" line of batteries are the first batteries with built-in jump starting! The revolutionary ATX20-RS Lithium RE-START Battery intelligently monitors its status, and just before going completely dead puts itself to sleep with just enough energy to get your vehicle started again. Simply press the RE-START Button located on the battery, start your vehicle and drive away... No more dead battery emergencies or being stranded! The Re-Start batteries can be stored 3x longer than lead/acid since they do not self-discharge, but they should be checked every 4-6 months if connected to a vehicle with "parasite drains".