KP Original USB Magnetic Charger for 3.7V Rechargeable Lithium Battery Charging Cord (BATTERY NOT INCLUDED) Easy to operate. Small size and lightweight, portable. 100cm cable length, convenient to use. USB port input voltage 5V/2A, output voltage 4.2V/1A. This USB charger cable is suitable for 3.7V 26650/18650/18500/18350/14500/10440/17670/16340 and more 3.7V lithium-ion rechargeable batteries.