Maintains and extends the life of your 12 Volts auto, deep cycle, gel cell and heavy duty batteries Environmentally safe - no electricity needed Plugs into 12 Volts DC accessory outlet or directly to battery; includes battery clips and 12 Volts accessory plug Easy installation for permanent mounting - hardware included Manufacturer recommends using the SPC-7A solar charge controller (sold separately) in conjunction with the solar battery charger for added battery overcharge protection
