Featuring a multitude of features, the Epilot E4 charger not only performs with remarkable efficiency, it also implements unique features to make it the best bang for your buck. The E4 charger is a quad bay charger designed for primarily 18650 batteries (batteries sold separately) which can be replaced through a sliding cover on the backside of the charger. Featuring a bright and simple LCD display, the display shows individual battery charges and a temperature monitoring system for the utmost protection and safety. The intelligent chip in the charger performs a series of functions such as overcharge prevention, reverse polarity protection, independent battery charging and also analyzes an inserted battery to charge the cell with the appropriate voltage and charging method. On top of the E4 performing as a charger for your 18650 batteries, the E4 also functions as a power bank with two different USB ports to plug in and charge any external unit, increasing the flexibility of the unit. Integrated on the bottom side of the device is a flashlight thank can be used in tandem with an SOS mode just in case of any emergencies. Small and packed with tons of features, the Epilot E4 charger proves you don't need to spend too much for a great charger.