1. Each card slot corresponds to an LED indicator, put the battery into the card slot to charge, the red LED indicator is on, after the charging time, the battery is removed from the product and the LED indicator is off 2. Six independent identification channel chips, which can simultaneously connect AA/AAA/C/D batteries and 2 9V batteries 3. Charging: Voltage-limited and constant current charging mode, using intelligent IC chip, keeps the current stable during the charging process, and the charging is safe and efficient. 4. The output voltage is 100-240v, no matter where you are, you can use the charger to charge anytime, anywhere 5. Using ABS material, it has heat resistance and low temperature resistance Product Name: Battery Charging Box Model: -C821BW Product Size: 195X93X52mm Applicable Models: No. 5 / No. 7 / No. 1 D-Type / No. 2 C-Type / 9V Output: AC100-240V 50/60Hz 0.15A MAX Standby Power Consumption: 0.5W MAX Input: D/C/AA/AAA Charging Current: CV=1.2V (Current 120mA-180mA)