This EBL 808 charger can charge 2/4/6/8 AA/AAA Ni-MH/Ni-Cd rechargeable batteries. Controlled by MCU, it can automatically stop charging when detecting improper input voltage, defective or short circuit or non rechargeable batteries. Using -∆V intellectual cut-off charging method, automatically turn to trickle charge, prevent the batteries from over-voltage, over-current or over-heat. AC 100-240V 50/60Hz input, 2.8V DC output shorten the time of charging (most similar chargers are 2.4V). Constant current charging would protect the batteries against current fluctuation and keep using the charger safely.