The Patona Dual LCD USB Charger is ideal for charging multiple batteries independently and simultaneously. It is also possible to charge batteries with different capacities at the same time. Additionally, you can charge a third device such as a phone, tablet, smartphone, or camera via the integrated USB output. The built-in charging technology is microcontroller-controlled, preventing overcharging or overheating. It also automatically detects the required voltage of the inserted battery. To cover as many applications as possible, the charger features two different charging modes: "L" for normal, battery-friendly charging and "H" for fast charging.