The 6V nimh charger is designed to charge a 2500mA 4 AA cell pack. The cell charger features automatically cut-off by negative delta V when battery pack attains full charge, with a built-in safety timer of 3.5H, charging terminated when battery voltage reach 6.1V threshold, accurate voltage measurements by using of pulse technique, compact, high efficient and low cost, LED indicate the charge status. The 6V nimh battery charger is backed by a 3 year warranty.