[Applicable Batteries] Suitable for 18V B-Series lithium batteries and replacement batteries: BL1860B/BL1850/BL1840/BL1830B/BL1815... [Product Function] This adapter can make listed lithium batteries use for 18V tools, and let you Enjoy benefits of extended run-time of Li-Ion Batteries on your existing 18V tools. [USB Interface Design] The USB interface (output: 5V 2.1A) allows you to charge your mobile phone, , and other small electronic devices at anywhere and anytime. (Note: This function requires battery insert as a source.) [Notice] It cannot be used to charge battery of a power tool, and adapter cannot be plugged into any charger. If you need to charge power , use for-original battery charger. Color:Green & Black Material:plastic Package Contents: 1 x Battery Convertor Adapter (without battery) Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.