Nitecore F1 Flexible Power Bank is a charger from Nitecore that doubles as a power bank when a 18650 battery is installed. Without an external power source, the F1 can charge an external device connected to its USB output port with a battery in its slot.
Optimized for IMR batteries, it's a smart charger and will charge batteries efficiently up to 1000mA. Auto current cut off included. Just plug and forget. The ideal charger to bring on long travel and outdoor trips.