?[Attention Please] This Item Is Just An Battery Adapter, Not A Battery. The Adapter Cannot Charge Battery Or Vaccum Cleaners. And It Won'T Consume Battery. If It Stop Working Suddenly When Cleaning For 10 To 20S. You Just Need To Fully Charge Your Battery, Then, Use It. And We Recommend Using Batteries Above 4Ah. Overall, The Usage Time Depends On The Installed Battery Capacity. Warm Tips: Remove The Adapter When Not Use. | | ?[Universal For Dyson V8 And V7 Series Vacuums] Our Adapter Is Universal For Dyson V7 And V8 Series Cordless Stick And Handheld Vacuum Cleaner, Such As V7 Motorhead Pro, V7 Trigger, V7 Fluffy Hepa, V7 Absolute Hepa, V7 Animal Hepa, V7 Car+Boat, V7 Mattress, V7 Extra, V8 Animal, V8 Absolute, V8 Slim Cordless Vacuum Cleaner.(? Note: For V8 Or V7 Series Vacuums, Not For Type A Or Type B Dc31 Dc34 Dc35 Dc44 Or V6 V10 V11 Series?) | | ?[Compatible With Craftsman V20 Lithium Battery] Convert For Craftsman V20 Lithium Battery(Cmcb204 Cmcb204-2 Cmcb202 Cmcb202-2).