IOTA DLS-55/IQ4 12 VOLT 55 AMP 4 STAGE AUTOMATIC SMART BATTERY CHARGER / POWER SUPPLY CONVERTS NOMINAL 108-132AC VOLTAGE TO 13.4 DC VOLTAGE FOR BOTH LOAD OPERATION AND 12V BATTERY CHARGING IDEAL FOR CHARGING ALL TYPES OF 12 VOLT LEAD ACID BATTERIES INCLUDING FLOODED, ABSORBED GLASS MAT ( AGM ) AND GEL CELL INCLUDES THE IQ4 SMART CHARGE CONTROLLER WHICH AUTOMATICALLY PROVIDES THREE-STAGE BATTERY CHARGING FOR SAFER CHARGING AND LONGER LIFE FOR YOUR SYSTEMS BATTERY 4 STAGE CHARGING: BULK, ABSORPTION AND FLOAT STAGE AS A POWER SUPPLY THE UNITS TIGHTLY CONTROLLED REGULATION ALLOWS THE USER TO OPERATE A NOMINAL 12VDC LOAD UP TO 55 AMPS