Efan NC1 intelligent charger is a portable USB mini charger with a 0.6A maximum constant current and a LED battery indicator. Its made of high quality materials and its is durable and reliable. Can charge many and different sizes such as 18650, 14500,16340 of lithium-ion batteries. Provides reverse polarity protection, Activation function, Auto-detection charging system, Over-charging and short circuit protection. Compact size and modern design can always be with you ready to charge your batteries