The Authentic Tesiyi T4 Smart Digital charger and adapter is white in color and is made of ABS material. The digital e-cig charger has an output voltage/current rating of 5 V/2.1 A, an input rating of 5 V/2A, and a power rating of 53.3 W. It also has a self-discharging capacity of 2.4 mAh per day. The charger has four slots and is capable of charging four batteries independently and simultaneously. It is used to charge 3.7 V 18650 lithium batteries. The battery charger has a digital display for easy monitoring of the charging progress and comes with a USB cable. It is rectangular in shape with rounded corners. The charger has a size of 85 x 113 x 27 mm and weighs 105 g.