36V or 48V / 13A-18A (auto-ranging) Lester Summit II High Frequency Golf Cart Battery Charger with E-Z-GO SB50 Plug. Features high efficiency with the industry leading charge algorithms. Features intelligent natural convection cooling (no fan) and high energy efficiency. Heavy duty aluminum enclosure resists water, dust, and other environmental elements. Advanced microprocessor prevents both under and overcharging which optimizes both daily battery capacity and overall battery life. Bluetooth Smart wireless communication lets you view charge cycle status, select active charge profile, and view history with smartphone app.