Nitecore F1: 

• Made of high strength, light weight Polycarbonate material. Its structural engineering is purposely redesigned for extra ruggedness to ensure ultimate safety in your dynamic outdoor expedition
• Automatically identifies battery types, and selects charging current and mode accordingly
• Monitors battery status real-time; Reports battery voltage upon battery installation as a smart multimeter
• Charges a Li-ion battery and a USB device intelligentl; Adaptable with various input sources such as USB adaptor and solar panel
• Compatible with Li-ion/IMR battery: 26650/18650/17670/18490/ 17500/17335/16340(RCR123)/14500/10440