The Authentic Coil Master A4 Charger has an ergonomic housing structure for easy insertion and removal of batteries. The housing also protects the batteries throughout the charging process. The electronic cigarette charger is black in color and is made of fire-resistant and fire-retardant ABS. The charger comes with its own adapter. It can charge four batteries independently at the same time. The charger has input voltage and current ratings of 5 VDC and 6 A respectively, and an output voltage rating of 4.2 VDC. It stops charging automatically when the batteries are fully charged. The charger has an ideal design for flat head batteries, optimal heat dissipation, and reverse polarity protection. It is used exclusively for charging 26650 18650 lithium batteries.