Batteries are expensive and they are quickly ruining our environment. If you want to care for the environment having great rechargeable batteries is the key! This battery charger works great for a wide assortment of batteries. It comes with a pair of 18650 Li-ion batteries that are commonly found in flashlights. They are 2600mAh in actual capacity and can provide hours of working time. - Batteries Charger: - Input 1: AC 100~240V 50/60Hz - Input 2: DC 12V 400mA - Output: 4.2V 450mA - Charges 18650/14500/18500/17670/17500 batteries - With LED status indicator - Comes with a power cord (2-flat-pin plug / 108cm length) - Batteries: - 18650 rechargeable li-ion batteries with protection board - Capacity: 3000mAh (Actual 2600mAh) - Voltage: 3.7V - 2 batteries per pack