Be charged and ready to go with La Crosse Technology’s BC9009 portable battery charger. Optimum simultaneous charging of AA & AAA batteries with separate cell display. Automatically defaults to 200ma charge and won’t overcharge, as the LCD displays voltage, charging current, charging percentage, and cumulative capacity for each cell compartment. Also, detects a defective battery from charging and works with all NiCd & NiMH AA and AAA rechargeable batteries. The previous version of this battery charger had known issues with the adaptor. This version comes with the new upgraded adaptor featuring overheat detection to protect against overcharging.