The charger is suitable for charging four batteries at the same time. With a USB-C socket, so it can be charged even from a computer or power bank. With protection against overheating, reverse polarity and short circuit. The charger is made of high-quality, durable and heat-resistant ABS plastic. Anti-shock protection prevents batteries from accidentally falling out. Intelligent, automatic charging voltage adjustment with USB-C connection for extremely flexible use Battery status indicator LED Thermal protection 0 V activation function for overcharged batteries Automatic charging shutdown Compatible batteries: 3.6V/3.7V Li-ion/IMR/INR/ICR 10440,14500,14650,16340 (RCR123), 17500,17670,18350,18490,18500,18650,18700,20700,21700,22650,25500,26650. 1.2V Ni-MH AA/AAA. 20700 and 21700 with non-rechargeable protection. Battery not included!