Product Information: Battery type: Liquid lithium ion battery (18650) Applicable type: General type Battery type: Cylindrical aluminum shell Shell material: Walnut Additional function: Smart charging and discharging Color: Walnut Power capacity: 2000mAh Support: Conversion Rate: 95 (%) Full set with packaging: 6.70 oz Input and output: 5V/1A Battery: 18650 lithium ion battery with a capacity of 2000 mA Size Information: Size: 3.94 × 0.98 × 0.98 in Gift box packaging size: 4.33 × 2.76 × 1.46 in