Your personal battery doctor. The XTAR VP4 Plus Dragon is the manufacturer's top-of-the-line battery charger. The charger is made of high-quality, durable and heat-resistant ABS plastic. Anti-shock protection prevents the battery from accidentally falling out. With protection against overheating, overcharging, reverse polarity and short circuit. Extremely flexible use with Micro USB connection Battery status indicator LED 0 V activation function for overcharged batteries Automatic charging shutdown Compatible batteries: 10440,14500,14650,16340 (RCR123),17335,17500,17670,18350,18490,18500,18650,18700,20700 ,21700,22650,2550, short 26650 (3.6V/3.7V Li-ion/IMR/INR/ICR), 3S. Normal 26650 and protected 20700 and 21700 cannot be charged. Battery not included! Read the detailed test of the Flashlight blog HERE!