Note!!!] - Only for 3.7V Lithium -ion Rechargeable Battery, Not AA or AAA Battery, Not NiMH Battery.
Multi-Function] - 4 slots can be adjusted according to different battery lengths. This charger is suitable for 26650/18650/18500/18350/14500/10440/17670/16340 lithium-ion rechargeable batteries.
Universal USB Interface] - The latest design of the USB battery charger, the working voltage of the battery charger is 5V, so you don't have to worry about the high voltage to bring you damage and disaster. USB charging can help travelers recharge their lithium-ion batteries anytime, anywhere, especially if you don't have enough outlets, and you can even simply plug it into your laptop or other device.
Safety Assurance] - 18650 Battery Charger Discharge Function Comes with special charge and discharge management circuit. With multiple security protection settings, the 18650 charger can effectively prevent reverse, short circuit, overcharge, over discharge, over-current damage to the Li-ion battery, which makes users using the product without any safety concern.
Smart Lithium Battery Charger] - 4 Battery bay has independent charging channels, it can automatically test battery capacity and charge four lithium batteries at the same time. The charging indicator allows you to clearly understand the charging status of the battery.