Say goodbye to long charging times. The NITECORE SC4 is capable of up to a blazing fast 3A speed in one slot and a total charging output of 6A. This four-slot universal charger handles most IMR/Li-ion and NiMH battery types including 18650, 16340, 14500, 26650 and more. Equipped with a USB output as well, the SC4 can be used to charge external devices such as laptops and cell phones. With intelligent charging features, using the SC4 is as easy as inserting your batteries into the charger - the SC4 does the rest. Both the charging current and voltage can also be adjusted for specialized batteries. A brightly lit LCD screen displays charging status and battery health while built-in overcharging, overheating and short circuit protections keep you and your batteries safe. In the event of a problem, the screen will read "EE EE" to alert users and cease charging.