【Work for Dyson V7+V8 Series Vacuum Cleaners】This RY18V7V8 adapter is universal for Dyson V7+ V8 Vacuum Cleaners, such as V7 Animal, V7 Absolute, V7 Motorhead, V7 Allergy HEPA, V7 Trigger, V7 Advanced, V8 Animal, V8 Absolute, V8 Fluffy, V8 Motorhead, V8 Slim, etc. ONLY for dyson V7 & V8. 【For Ryobi 18V Battery】The vacuum adapter converter perfect for Ryobi 18V lithium battery P109 P122 P192 P193 P194 ect and for Ryobi 18V Ni-Mh batteries(Battery not included). We suggest using 4AH or higher volume genuine ryob 18V battery. The using time of RY18V7V8 adapter depends on your battery volume and life. 【Safe & Reliable】The RY18V7V8 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 shows red which means lack of power. 【Easy to Install】The RY18V7V8 battery adapter is very easy to install. Just need 3 steps: 1. Remove the original battery from the V7/V8 vacuum; 2. Install our RY18V7V8 adapter into the base of vacuum; 3. Insert 18V 4ah or higher volume of for ryobi li-ion battery into the base of our RY18V7V8 adapter, and then you can use V7/V8 vacuum cleaner as normal. 🔊NOTE: Please remove the battery when not in use. 【Package】Package includes: 1* RY18V7V8 converter; We provide 100% satisfaction for this RY18V7V8 adapter, any questions or problems when using, just let me know, we'll help you ASAP. Item Weight 7.4 ounces Manufacturer URUN Item model number RY18V7V8 Batteries required Yes Package Dimensions 6.18 x 5.2 x 3.62 inches