Lenmar Enterprises MSC815 Mach 1° Lightning™ 8/15 Minute SpeedCharger is a highly advanced and fully automatic battery charger compatible with AA and AAA-size NiMH batteries. Its microprocessor-controlled NeoTherm2 Active Pulse Speedcharging charges one to four batteries individually. It can fully charge two PROH cells in as little as 8 minutes or four PROH or other NiMH cells in 15 minutes. The charger features a dedicated LED indicator for each battery, showing the charge status, and a built-in cooling fan to prevent overheating.