?Compatible With V7 V8 Vacuum?Our Battery Adapter Is Designed For Dyson V7 V8 Series Vacuum Cleaner. It'S Perfect Fit For V7 Sv11 Absolute Animal Motorhead Vacuum Cleaner For V8 Absolute V8 Animal V8 Fluffy V8 Motorhead V8 Cordless Stick Vacuum V8 Sv10 Handhold Vacuum Cleaner. Note: It'S Only For V7 V8, Not For V6 V10 V11 V12 V15 Dc30 Dc31 Dc34 Dc35 Dc44 Dc45 Dc56 Dc57 Sv03 Sv04 Sv05 Sv06 Sv07 Sv08 Sv09 Sv12 Etc. | | ?For Ryobi 18V Battery Adapter?This Battery Adapter Is Compatible With Ryobi 18V 4Ah And Higher Volume Lithium Battery P108 P122 P145 P192 P193 P194 P197 Pbp005 Ect And For Ryobi 18V Ni-Mh Batteries. Having The Both Item, You Can Use V7 V8 Vacuum Cleaner As Normal When The Original Battery Damaged, Instead Of Buying A New One. | | ?Safe Reliable?The Ryo18V7V8 Battery Adapter Buit-In Over Voltage, Over Charge, Over Current And Over Heat Protection Technology, Safe To Use. Designed With Led Indicator. The Light Shows Green Which Means Normal Work; And It .