Features: brand new and high quality The for shell is made of high-quality materials, . Adopt intelligent ICchip, automatic stop when full, with output short circuit, anti-battery reverse connection for protection, to ensure charging safety. USB charging, low voltage, safe, can be connected to cell phone chargers, computers, power banks, etc. for charging, simple and convenient. With an LED indicator, the red light is for always on when the battery is charged, and the green light is for always on when the battery is fully charged empty. The negative of the slot is designed with a retractable spring, which can charge various specifications of lithium batteries such as 18650, 18490, 14500, 16340, and 10440. Specifications: Environmental for for Shell Size: Approx. 27x22x102 mm/1.06x0.86x4.01 in Input: DC5V/1A-2A Output: 4.2V 500mA Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 2x Charging Adapter