Nitecore F4 Li-ion Battery Charger resembles a battery charger and power bank simultaneously, which makes it effective and feasible to have a comfortable operation. For the inside, it contains 4 independent slots that are all available for charging 18650 Li-ion batteries and have max charging current of 1A. The single USB port output current reaches to 2A so that it can be used as a power bank for charging tablets, smart phones, cameras and so on. It is equipped with a miniature screen that can show the conditions of battery voltage and charging current and more in real-time. What’s more, it is able to automatically arouse the energy saving hibernation function. The intelligent charging mode selection(CC/CV) as well as battery group discharging instills powerful magic of convenience and practice.