Efan Q2 is a 2-Slot high quality charger designed to meet the needs of majority consumers. The Simple appearance of the charger is full of modern aesthetic and easy to learn the charging status with the 2 LEDs indicators. Q2 with AC power supply, applies to a transformer to isolate the high and low voltage. With top-of-the-line safety performance, additional features include: reverse polarity safeties, short circuit and over-charge protection and low voltage activation function. With a focus on safety and humanized operation, which allows the users to operate Q2 with ease and convenience. Can Charge different types 0f 3.6V / 3.7V lithium batteries, commonly used in e-cigarettes, flashlights, electronic tools, instruments, meters etc.