The Schumacher Electric NAPA Battery Charger/Starter, No. 85-2450, is a 6V/12V fully automatic battery charger with a 225 amp starter. The charger/starter is microprocessor-controlled for added precision, safety and battery life. This unit is safe for standard and AGM batteries. The unit offers polarity detection, which helps avoid damage to batteries and sensitive electronics caused by reverse connection. It has the option to be timer-controlled or continually operated. The NAPA Battery Charger/Starter offers a professional-quality handle, grounded heavy duty power cord, automatic reset overload and short circuit protection and a two-year limited warranty.