Nitecore UM20 Li-ion battery Charger USB Management and charging system For 18650/18490/18350/17670/17500/16340/14500/10440 w/ Lightjunction Keychain Light Output: 4.2V  1% / 5V Input Voltage: Micro USB DC 5V Output Current: 1000mA / 500mA USB charging input and output Includes: Lightjunction Keychain light