Recharges your RV’s battery to 90% in 2-3 hours and extends your battery’s life! Most converters with a built-in battery charger only have one charging mode, 13.6 volts. Features Total Charge Management System Interface, electronic current limiting, reverse battery protection, low line voltage protection, and an intelligent cooling fan. With solid-state electronics. 3-5/8" x 8" x 9". 4-1/2 lbs.