Feature:This 18V to 21.6V battery adapter is designed to running Dyson V6 series cordless vacuum. Well compatible with Dyson V6 Animal Vacuum, V6 Motorhead Vacuum, V6 Trigger Vacuum, V6 Absolute Vacuum, V6 Slim Vacuum, V6 HEPA Vacuum, V6 Cord-Free Vacuum, V6 Fluffly Vacuum.Adapter Fit for V6 Series Model: (NOT for V7 V8 V10 V11 DC31 Series Vacuums):V6 Absolute,V6 Animal , V6 Motorhead, V6 SlimDC58 DC59 DC61 DC62 DC72 DC74SV03 SV04 SV05 SV06 SV07 SV09, 595 650 770 880 vacuumV6 Car+ Boat,V6 Top Dog,V6 Mattress,V6 Trigger, V6 Trigger Pro Excl, V6 Multifloor Exclusive, V6 Top Dog HEPA, V6 Trigger Extra, V6 Baby+ Child VacuumAbout Convert Makita Battery item:Fit well for Makita 18V Li-ion batteryConvert Makita 18-Volt battery Lithium BL1815, BL1820, BL1830, BL1830B, BL1840, BL1840B, BL1850, BL1850B, BL1860, BL1825, BL1835, BL1845, 194205-3, 194309-1, 194204-5, 196399-0, 196673- 6, and LXT-400 battery to Dyson V6 replacement battery.About Convert Milwaukee/DeWalt Battery item:Fit well for Milwaukee 18V Li-ion battery : This Adapter compatible with Milwaukee M18 18V lithium-ion Compact and XC Cordless Tool Battery Packs 48-11-1850, 48-11-1820, 48-11-1828, 48-11-1835, 48-11-1812 and 48-11-1815 etc.Fit well for Dewalt 20V Li-ion battery: Compatible with DEWALT 20V MAX XR Battery DCB205 DCB200 DCB180 DCD985B DCD771C2 DCS355D1 DCB606 etc.Note:1. This is an adapter/converter, NOT a battery, and NOT include the battery. This adapter CANNOT be used for charging. When the adapter is plugged into the battery. Please REMOVE the adapter from the battery before charging battery. This adapter can only be used with batteries above for 18V Li-ion battery 4000mAh (including 4000mAh). If your 18V batteries is under 4000mAh, and use it on the vacuum cleaner, the batteries' working time will not long.2. This adapter DON'T fit 12V CXT battery or M18 battery.3. This adapter ONLY for V6 Series Vacuums, NOT for V7 V8 V10 V11 DC31 Series Vacuums.4. Use proper batteries for this adapter, improper battery can lead to adapters damage.5. Adapter no need to be charged.Package Includes:1 Pcs Battery Adapter (Adapter only, Battery not included)