The AC 220V Dual Charger you are referring to is a charging device that can charge multiple types of Li-ion batteries, including 18650, AA, AAA, 17650, 16340, 14500, and 10500 batteries.

The charger is designed to work with a standard AC 220V power source, so you will need to plug it into a wall outlet to use it. Once the charger is plugged in, you can insert the batteries you want to charge into the appropriate slots on the charger.

The charger is capable of charging two batteries at the same time, which can be useful if you need to charge multiple batteries quickly. It also has built-in safety features to prevent overcharging and protect your batteries from damage.

Before using the charger, be sure to read the user manual and follow the manufacturer’s instructions carefully to ensure safe and proper use. Additionally, it is important to only use the charger with the types of batteries it is designed to charge and to never attempt to charge non-rechargeable batteries or batteries of different chemistries.