Basen BS4 FAST 18650 charger 4 bay usb AC/DC car adapter digital analyzer smart cirtuit protection combo Can be on different specifications 10440/14500/14650/16340/17500/17670/18350/18500/18650/18700/ 22650/ 25500/26650 3.6V/3.7V Li-ion battery charging at the same time) Available to 4 kinds of charging current (300ma, 500ma and 700ma, 1000ma) Each independent LCD displays independent battery charging parameters . Programmed to have 0 V voltage activation function, short circuit, bad battery intelligent recognition and reverse connect battery protection. The DC input,charger working power supply for 12v -2.5v (5.5 * 2.1 * 10 mm stand head) With 5v/ 1000mA USB output function With 5v/ 1000mA USB output function FREE Car cable for charging on the go