The compact B441 charger, equipped with intelligent technical features and safety precautions, can charge up to 4 AA or AAA batteries simultaneously. The sturdy cassette also serves as a battery holder, securely storing the batteries. In just 3 hours, the device charges 4 2100 mAh AA batteries via a USB connection. The charging progress can be monitored through the LED display, which indicates the charging status as well as whether disposable batteries or faulty batteries have been inserted. A new feature of this charger is the battery status check function. With this feature, you can quickly and easily verify whether your batteries are still sufficiently charged or need recharging. This way, you can avoid unexpected situations with dead batteries and prevent your batteries from being unnecessarily charged. Additional safety details include the automatic power-off timer and dV full charge detection, which help prevent overcharging, overvoltage, and short circuits, as well as prolonging battery life. This versatile charger works via USB or any GP RECYKO charging dock specifically designed for the RECYKO chargers of models B441 and M452. Four 2100 mAh AA batteries are included, so you are well-equipped with this optimal charging solution. An advanced charging station for RECYKO chargers that makes charging easier than ever before. The charging station not only displays the status of your batteries more clearly but also significantly improves charging time. The unique, space-saving design of the charging station keeps the RECYKO battery charging unit vertical. It is powered via a USB connection, making it ideal for use at home and in the office. When the charger is connected, the integrated LCD display shows the charging status and condition of the batteries.