Description: Smarter: Intelligent IC control, it will automatically stop when the battery is fully charged. Safer: Prevent the battery from being connected reversely and prevent the output short circuit function. More convenient: mobile phone charger or computer USB charging, easy to use. Clear instructions: the red light is on when charging, the green light is on when it is empty or fully charged. Specifications: Specifications: Input: DC5V/1A Output: 4.2V/500MA Adapt to the battery: 16340 / 14500 / 18650 / 26650 Packing size: 102*22*27mm/4.33*2.36*0.79in Weight: 20g Factory inspection environmental conditions 1. Using environment: temperature: 0-35C humidity: 95% 2. Storage environment: temperature: -25 ~ +60 C humidity: 85% 3. The body temperature rise during work: when the charger working, the surface temperature rise of the charging case 25C, the surface temperature rise of the battery 30C. Package Included: 1* Battery Charger