NITECORE UI1 At-A-Glance Max charging current of 800mA Intelligent charging mode selection (CC and CV) Lightweight and portable for outdoor charging Charges large-sized batteries like 20700, 21700 batteries & more Micro-USB port is compatible with USB adapters, solar panels, power banks, and more Displays real-time battery level and charging status INCLUDED IN THE BOX NITECORE UI1 charger USB-C charging cable Single-Slot Lithium Battery Charger Powerful and compact, the NITECORE UI1 is a single-slot portable USB Li-ion battery charger capable of reaching a maximum charging current of 800mA and supports 18650, 18350, 20700, 21700 and various types and sizes of lithium batteries. Safe and Intelligent Charging A power indicator provides users with real-time battery level and charging status. It also provides multiple charging safeguards to prevent from reverse polarity, overcharging, and overheating. Portable USB Charging The UI1 features a micro-USB port compatible with various power sources including power banks, solar panels and USB adapters for quick and efficient charging. Weighing 1.43 ounces, the lightweight design of the UI1 allows you to carry this charger everywhere you go. Measuring 4.82 inches, the UI1 fits comfortably in the palm of Input DC 5V/1A 5W Output voltage 4.2V±1% Output current 1000mA (MAX) Compatible with Li-ion/IMR: 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14430, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500,17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22500, 22650, 25500, 26500, 26650