Special featuresStreamlined, fast charger with smart technical features and safety provisions that can charge up to 4 AA or AAA batteries simultaneously.The sturdy cassette with an extra cover can also be used as a battery organizer, safely storing the batteries.The charger fully charges 2 batteries in approximately 2 hours or four batteries in approximately 4 hours (2100mAh AA batteries) via a USB connection.The two-color LED display not only indicates the charging status but also whether single-use 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 dataDimensions: 68x74x26mmWeight: 51.5gNumber of charging slots / Channels: 4 / 4LED indicator: 4- Green LED ON for 0.5 seconds after connecting via USB- Charging: Green LED blinks slowly- Fully charged: Green LED ON- Defective/Single-use batteries inserted: Red LED blinks rapidlyOutput Voltage / Charging Current- D.C. 1.4V / 1100mA (for 1-2 AA Batteries)- D.C. 1.4V / 730 - 550mA (for 3-4 AA Batteries)- D.C. 1.4V / 730mA (for 1-2 AAA Batteries)- D.C. 1.4V / 490 - 370mA (for 3-4 AAA Batteries)USB power input: D.C. 5V / 1ACharging time (Input D.C. 5.0V 1.0A min., 2 batteries):- 2100mAh AA battery: 120 minutes- 850mAh AAA battery: 120 minutes