Verilux Li-ion 18650 Battery Charger USB Travel Li-ion of 3.7V/4.2V, 26650 21700 14500 Camera Battery Charger  (Black)

WIDE COMPATIBILITY: This li ion battery charger 3.7v works for most Li-ion battery type thanks to the flexible battery bay design. including 217/2665/1865/1634 battery (3.7V/4.2V). NOT FOR AA /AAA BATTERY /NIMH/NICd.SAFE CHARGING: This cell charger for rechargeable battery li lion is equipped with smart charge and discharge management. With multiple safety protection settings, the charger can effectively prevent the battery from being reverse polarized, short circuit, overcharging, over-discharging, or damaged by overcurrent, safe to use, can well maintain original battery performance.EFFICIENT CHARGER: This 1865 USB battery charger constant current charging to improve the efficiency of lithium batteries. Input: 5V/2A; output: .8A. The 5V 2A adapter is recommended.USB PLUG AND PLAY: This USB battery charges plug and play, can be powered by power bank, car USB charging port or connect with power adapter of 5V/2A. The charging indicator allows you to clearly understand the charging status of the battery. When the battery is fully charged, the indicator will be green, convenient to use.PRACTICAL APPLIANCE BATTERY CHARGER: This battery charger a commonly used rechargeable battery is widely used on flashlight, electronic products. This compact and portable battery charger for most 3.7V/4.2V li ion battery, perfect for home, office, travel use.