Specification of USB battery charger:

Input: 5V USB (Worldwide used voltage) Max: 1000mA

Output: 4.2V DC 500mA

Compatible: 10440/14500/16340/18500/18650 3.7V li-ion battery

Battery charging rate: over 80%

No Load Power Consumption:1W MAX

Full Load power consumption:7W MAX

Size: 12.5*3*7 CM Weight: 2.5oz

Compatible with: 10440/14500/16340/18500/18650 3.7V li-ion battery

Tips to keep 18650 batteries long lifespan and maintain capacity rating

You do not deep discharge before recharging 18650 batteries. The capacity of 18650 battery reduces to less than 50%; you should recharge it.

The high temperature will cause short lifespan and reduce capacity rating. That why you do not store it in high temperature and quick recharge it at high-charging-current as well.

You should buy a smart 18650 battery charger which is worth the money. NK-206 Professional charger, the better choice.

warning:

Battery may explode or fire if mistreated;

Do not disassemble or dispose of in fire;

Do not charge except specified charging condition;

Do not heat above 212 degrees Fahrenheit or short circuit;

Do not crush or modify.

Package:

1 x USB battery charger

1 x User manual

4 x TR1865O(3000*mAh)