aLLreLi 4 Bay Intelligent Fast Charging Battery Charger w/ LCD Indication, Battery Activation & Discharge Function for AA / AAA / Ni-MH / Ni-Cd Rechargeable Batteries aLLreLi 4-Bay Intelligent Fast Charging Battery Charger for AA / AAA / Ni-MH / Ni-Cd Rechargeable Batteries, Charges up to 4 AA or AAA rechargeable batteries at the same time. The LCD display can indicate charging status of batteries Battery Activation: enable to activate and charge them full when no power for a long time Battery Discharge: Pressing the REFRESH button and it will enter the discharge cycle. You can charge and discharge your batteries to keep them in good conditon in the long term Package included: aLLreLi BQ303 Intelligent Fast Charging Battery Charger(Not include batteries), 1 x User Manual