The LUC V4 smart charger is a charging champ! This bad boy can charge up to four batteries at a time and can fit a wide range of batteries (10440 to 26650). With three different charging modes, you can charge four batteries at a time at with 0.5A or 1A, or charge two 25500 or two 22650 batteries at 2A. A quick charge means that your batteries will be juiced up sooner so you can get back to your vape ASAP. This Product Features: Compatible with the following battery sizes: 10440/14500/14650/16340/16650/17650/17670/17350/18490/18500/18650/22650 Charging modes: 0.5A, 1A, and 2A Low power alarm Built-in reverse polarity protection Zero voltage activation function Overcharge protection You Will Receive: 1x - LUC V4 charger 1x - Car charger 1x - Wall plug NOTE: When inserting a battery with the wrong positive or negative end, LCD will shows ‘Error’ and stop charging; please insert the batteries to correct polarity.