*Independent Slot - AA, AAA smart battery charger offers 36 different channels allowing you to charge any combination of 1.2V AA/AAA NIMH/NICD rechargeable cells. Includes a worldwide 100~240v AC adapter,Eliminate the need for multiple household AA/AAA battery chargers. *LED Lights: aa aaa nimh battery charger that can not be charged- flash;being charging- red;fully charged- green; displays the charging/discharging status of each individual battery. *Intelligent charging control- Features Pre-charging, quick charging, floating charging, trickle charging;overcharging, overheating, short-circuiting, over-current, and reverse-polarity protections on the NiMH/NlCd battery charger. Additionally, the eight hour timer helps save energy and prolong battery life. *Heat Dissipation: it can help AA AAA rechargeable battery to reduce the temperature,it is automatically cut off when fully charged,will help save energy and prolong battery life