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The double-bay UM20 Battery Charging System from Nitecore is a versatile charger for lithium-ion and IMR batteries. An intelligent power management system automatically detects the number of batteries installed, evenly distributes charging power, and selects the appropriate charging current based on the specific needs of each battery installed. Besides charging batteries, this charger also provides output power from a standard USB port, enables data transfer throughput via the USB and micro-USB ports, and features an integrated USB cable winder. A LCD screen clearly displays the charging status and power level of each battery, and output selection. Reverse polarity and over-charge protection prevents damage to the batteries if one or both are installed incorrectly or left in the charger after charging is complete.
Two independent charging bays
Separate spring-loaded sliders accept different battery sizes and ensures a secure connection
When full current is available, it will simultaneously charge batteries and USB device
When full current is not available, user can choose Battery or USB Priority modes
Battery Priority: Batteries are charged completely then switches to charge the device plugged into the USB port
USB Priority: When device plugged into USB port is fully charged, it will switch and charge the batteries second
Selectable according to user preference
Detects battery number and current status of each
Automatically selects "constant current" or "constant voltage" depending on each battery requirement
Switches to "trickle charge" when batteries are full to maintain full charges
Over-charge protection cut current to prevent damage to batteries
Allows data transfer from external USB device to computer using the standard and micro-USB ports
Reverse polarity protection: Stops charging process if battery is installed incorrectly
LED screen displays battery power level and charging status