This charger can charge 4 pcs of AA/AAA Ni-MH/Ni-Cd rechargeable Batteries & have an LCD Display. Charging by IC control, with -V intelligent Cut-Off the rapid charging function, automatic transfer of Trickle-Charging, ensure the battery can be fully charged and not overcharged. The LCD will be ON & show its background colour after connecting with the power adaptor. There is a "CHG" showing on the LCD after the battery is loaded. Auto identify function is indicated on non-rechargeable battery, Short circuit battery and defective Battery.