1、MAIN FUNCTION: Remove the lithium battery from the power tool, this adapter can reduce tool weight, and reduce hand fatigue during operation. 2、PLASTIC HOUSING: The lithium battery adapter is made of excellent plastic material, with good toughness, wear resistance, which is lightweight and durable. 3、APPLICABLE TOOLS: This battery extension wire tool is suitable for BL1815 BL1820 BL1830 BL1840 BL1850 BL1860, and other interface power tools, with good compatibility. 4、APPLICABLE BATTERY: Suitable for 48‑11 1811 48‑11 1840 48‑11 1850 2620 2630 48‑11 1811 48‑11 1815 48‑11 1820 48‑11 1822 48‑11 1828 48‑11 1852 lithium ion battery. 5、PORTABLE DESIGN: Equipped with battery holder with hook, which can be hung on a belt, with a total length of 1.6 meters, suitable for various work scenarios.