Waterproof, shock and vibration resistant, lightweight (less than 4 pounds), compact charger designed for either portable operation or permanent mounting. Charges and maintains both flooded and sealed, maintenance free, AGM, lead acid batteries. Float/maintenance function maintains batteries at proper storage voltage without the damaging effects caused by trickled chargers. The Power Tender Plus is easy to use, rugged, compact, and packed with power. 12 volt at 5 amps.