Streetwize 12volt 4 amp battery charger 12v 4 amp battery charger with 27 amp dc 4 amp rms charging suitable for lead acid batteries only for use with car motorcycle and lawnmower batteries it is a portable and robust heavy duty battery charger with leds to show current charging levels double insulated and protected against thermal overload and reverse battery connection suitable for lead acid batteries only for use with car motorcycle and lawnmower batteries it is a portable an