The Grip 38020 12V automatic battery float charger is used for the maintenance of wet or gel cell batteries that are stored or used periodically in such items as boats, cars, snowmobiles, ATVs and tractors.Features Include: The float charger prevents self discharge of the battery, while maintaining and extending the life of rechargeable 12V batteries It maintains a battery charge for batteries rated from 5 to 125 Amp-hours, by providing a constant (minimum current) 13.5 VDC regulated output Other types of chargers provide a strong, rapid charge but tend to boil out liquids and decay electrodes Auto Shut off feature protects batteries Input: 120V AC, 60 Hz, 14 watts Output: 13.5V DC UL listed