The Nitecore UNK2 is a compact digital USB charger specifically designed for Nikon camera batteries. With a USB port for power supply, it is the perfect companion for on-the-go or travel use. The charger features two charging slots, one on the front and one on the back. The LCD display provides various information about the charging process: battery voltage, charging current, temperature, charging progress, and battery condition. The UNK2 automatically selects the appropriate charging method. It is compatible with batteries from the following cameras: Nikon D500, Nikon D600, Nikon D610, Nikon D750, Nikon D800, Nikon D800E, Nikon D810, Nikon D810A, Nikon D850, Nikon D7000, Nikon D7100, Nikon D7200, Nikon D7500, Nikon 1V1, Nikon V1.