Special featuresCompact charger with smart technical features and safety provisions that can charge up to 4 AA and AAA batteries simultaneously. The sturdy case can also be used as a battery organizer, safely storing the batteries. The charger charges 8 AA batteries of 2100mAh in 6 hours via a USB connection. Charging progress can be monitored via the LED indicator. The LED indicator also warns if non-rechargeable or defective batteries are inserted. Other safety features include automatic power cut-off and detection of fully charged batteries, which helps prevent overcharging. Additionally, the charger is protected against overvoltage and short circuits for optimal battery life. Technical specificationsDimensions: 126x74.5x21.3mmWeight: 40gNumber of charging slots / Channels: 8 / 2LED indicator: 2- Green LED ON for 0.5 seconds after connecting via USB- Charging: Green LED flashes slowly- Fully charged: Green LED ON- Defective/non-rechargeable batteries inserted: Red LED flashes rapidlyOutput Voltage / Charging current- D.C. 2.8V / 400mA (for AA Batteries)- D.C. 2.8V / 320mA (for AAA Batteries)USB power input: D.C. 5V / 1ACharging time (input D.C. 5.0V 1.0A min., 2 batteries):- AA battery of 2100mAh - 360 minutes.- AAA battery of 850mAh - ~180 minutes