Li-ion 18650 3.7v battery charger 4-piece battery charger a direct plug-in charger that you can use to charge your 18650 li-ion batteries. this charger is very easy to use, with which you can charge your 3.7v rechargeable 18650 lithium batteries. it offers the ability to charge four, three, two batteries or a single battery at the same time. the battery or batteries should be installed on the product in such a way that the positive and negative aspects are correct. then the charger is plugged into the socket. the led on the device starts to glow red. when the batteries are full, the led light on the product turns green. for your safety, do not leave this product on charge overnight or leave the product plugged in after the batteries are charged. unplug it when charging is complete. specifications: input: 220v ac output: 4x4.2v dc output amps: max 1200ma (4x300ma) dimension: 1004x90x30mm maximum 10 pieces of this product can be ordered. swordslife reserves the right to cancel orders over 10 units. more than 10 stocks are offered to be sold at the campaign price. the seller determines the selling price of the product you have examined. a product can be sold by more than one seller. sellers of products offered for sale by more than one seller are listed according to the price they set for the product, seller ratings, delivery status, promotions on the products, whether the cargo is free or not, whether the products can be delivered with fast delivery, and the stock and categories of the products. Create a party-ready atmosphere with this colorful LED lighting. Easy to install and perfect for events or home decoration.