Nitecore F1 IMR/Li-ion Battery Charger USB Charger With Skyben Battery Case Compatible With IMR/Li-ion 26650/18650/17670/18490/17500/17335/16340(RCR123)/14500/10440 Charges a Li-ion battery and a USB device intelligently. Adaptable with various input sources such as USB adaptor and solar panel. Automatically identifies battery types, and selects charging current and mode accordingly. Capable of charging or powering USB devices directly. Receives power from external devices.