Battery Extender, No. SP3

The Schumacher SP3 Battery Extender is a fully automatic microprocessor-controlled battery charger that maintains both 6V and 12V batteries, keeping them at full charge using float-mode monitoring. This unit is great for charging small batteries, and maintaining small and large batteries kept in storage, including motorcycles, classic cars, RVs, boats. This 3 amp charger and maintainer provides a scrolling messaging display, and can automatically switch from full charge to float-mode monitoring. Other features include a quick-connect harness, the ability to snap either connector into place in seconds, reverse-hookup protection, auto-voltage detection and a hook attachment to hang the unit outside the work area for safety and convenience.