Parameter
Item:21V 1A Supply power 
Input: AC100V-240V 50/60Hz 
Output Voltage: DC 21V 
Output Current:1A 
Female connector size:5.5mmX2.5mm(inside"+", outside"-") 
Product Features:
Superior SafetyBuilt-in safety chip for full protection against overcharging, overcurrent and short circuits.The shell is made of ABS flame-retardant material with strong fire resistance and heat resistance you can easily and comfortably use it for charging。

LED light indication】LED light indication for efficient and fast charging; When the battery is connected, the indicator light turns red to start charging。 When the battery is fully charged, it will automatically turn green to indicate that the battery is fully charged。

High-speed transmission copper core wire】The data line is copper core wire, which can save energy and transmit power at high speed, and has high oxidation resistance and corrosion resistance to ensure the service life of the product。

Broad Compatibility】AC 100-240V, 50/60HZ input, DC 21V, 0-1000MA, plug outer diameter is 5.5mm, inner diameter is 2.5mm (compatible with 2.1),Widely used in electric wrench, electric screwdriver, lithium electric saw,Cordless Chainsaw , LED strip light, Balance Car, router, etc。

Package Included:
1*Battery charger