Function 1. Multiple Specifications Optional This adapter is designed to charge lithium batteries, with three optional voltages of 16.8V, 18V and 21V, which can be widely used for a variety of lithium tools with different voltage requirements, greatly improving the applicability to meet the changing needs of different devices. 2. Efficient charging It uses the developed charging technology not only to quickly charge the lithium battery, shorten the charging time and improve the work efficiency, but also to effectively etend the battery life. 3. Multiple protections Builtin multiple safety protection mechanisms, including overcharging, overheating, short circuit protection, etc., to fully improve the safety of the charging process and effectively reduce battery damage or even safety accidents due to improper charging, so that users can use it with greater peace of mind. 4. Fine craftsmanship Made of the highest quality materials, combined with a rigorous production process, to ensure that the adapter has high durability and reliability and can work stably in different environments, to provide a longterm charging service. 5. Portable design The adapter is compact and easy to carry, suitable for a variety of occasions. It is also equipped with an LED indicator to provide realtime feedback on the charging status, making the charging process more intuitive and clear. Specification This adapter is designed to charge lithium batteries, with three optional voltages of 16.8V, 18V and 21V, which can be widely used for a variety of lithium tools with different voltage requirements, greatly improving the usability to meet the changing needs of different devices. It uses the developed charging technology not only to quickly charge the lithium battery, shorten the charging time and improve the work efficiency, but also to effectively etend the battery life. Features Multiple Specifications Optional This adapter is designed to charge lithium batteries, with three optional voltages of 16.8V, 18V and 21V, which can be widely used for a variety of lithium tools with different voltage requirements, greatly improving the applicability to meet the changing needs of different devices. Efficient Charging It uses the developed charging technology not only to quickly charge the lithium battery, shorten the charging time and improve the work efficiency, but also to effectively etend the battery life. Multiple Protections Builtin multiple safety protection mechanisms, including overcharging, overheating, short circuit protection, etc., to fully improve the safety of the charging process and effectively reduce battery damage or even safety accidents due to improper charging, so that users can use it with greater peace of mind.Fine craftsmanship Made of the highest quality materials, combined with a rigorous production process, to ensure that the adapter has high durability and reliability and can work stably in different environments, to provide longlasting charging service.Portable design The adapter is compact and easy to carry, suitable for a variety of occasions. It is also equipped with an LED indicator to provide realtime feedback on the charging status, making the charging process more intuitive and clear. Specifications Name Battery Adapter Material Plastic Metal Output Voltage 16.8V, 18V, 21V optional Input Voltage 100240VAC Current 1A Item Size 87 50 68mm 3.43 1.97 2.68in Item Weight 69g 2.43ounce Package Size 100 80 60mm 3.94 3.15 2.36in Package Weight 73g 2.57ounce Packing List 1 Battery Adapter Packing List 1 Battery Adapter