Feature: 1. 【Multi-specification Optional】: This adapter is designed for recharging lithium batteries, with three optional voltages of 16.8V, 18V, and 21V, which can be widely applied to a variety of lithium tools with different voltage requirements, greatly enhancing the practicability to meet the changing needs of different devices. 2. 【Efficient Charging】: It adopts the developed charging technology not only to recharge the lithium battery quickly, shorten the charging time, and improve the working efficiency but also effectively prolong the service lifespan of the battery. 3. 【Multiple Protections】: Built-in multiple safety protecting mechanisms, including overcharging, overheating, short-circuit protections, etc., to fully enhance the safety of the charging process, and effectively reduce battery damage or even safety accidents due to improper charging, so that the users can use it with greater peace of mind. 4. 【Fine Craftsmanship】:Made of premium quality materials, combined with a rigorous production process, to ensure that the adapter has high durability and reliability and can work stably in various environments, to provide a long-lasting 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 real-time charging status feedback, making the charging process more intuitive and clear. Specification: This adapter is designed for recharging lithium batteries, with three optional voltages of 16.8V, 18V, and 21V, which can be widely applied to a variety of lithium tools with different voltage requirements, greatly enhancing the practicability to meet the changing needs of different devices. It adopts the developed charging technology not only to recharge the lithium battery quickly, shorten the charging time, and improve the working efficiency but also effectively prolong the service lifespan of the battery. Features: 【Multi-specification Optional】: This adapter is designed for recharging lithium batteries, with three optional voltages of 16.8V, 18V, and 21V, which can be widely applied to a variety of lithium tools with different voltage requirements, greatly enhancing the practicability to meet the changing needs of different devices. 【Efficient Charging】: It adopts the developed charging technology not only to recharge the lithium battery quickly, shorten the charging time, and improve the working efficiency but also effectively prolong the service lifespan of the battery. 【Multiple Protections】: Built-in multiple safety protecting mechanisms, including overcharging, overheating, short-circuit protections, etc., to fully enhance the safety of the charging process, and effectively reduce battery damage or even safety accidents due to improper charging, so that the users can use it with greater peace of mind. 【Fine Craftsmanship】: Made of premium quality materials, combined with a rigorous production process, to ensure that the adapter has high durability and reliability and can work stably in various environments, to provide a long-lasting 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 real-time charging status feedback, making the charging process more intuitive and clear. Specifications: Name: Battery Power Adapter Material: plastics + metal Output voltage: 16.8V, 18V, 21V (optional) Input voltage: 100-240VAC 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 Power Adapter Package List: 1 * Battery Power Adapter