The Innovate BP-1 Battery Pack allows you to test & log without the hassle of hooking the unit up to a 12-volt source. The BP-1 is a foam lined heavy duty plastic carrying case with a built-in 12-volt rechargeable battery & charger. The BP-1 battery allows you to log to an LM-1 (not included) for up to an hour between charges. The BP-1 works great on Sprint Cars, Midgets, Quarter Midgets, Go Karts, Motorcycles, or any application where no battery exists or is difficult to locate.