When testing battery was dead so I purchased a new battery (included). I also noticed the motorhead did not work so I got a new 3rd party motorhead brush and that did not work either. When I test the pin I get 18v even when the unit is not powered on so not sure if it is a compatibility issue or an issue with the unit. Works great with attachments and suction is excellent just can't get it to work with my motorhead brush. Sold as working with possible motorhead issue. Great as is if you plan to use it for your car or tight places with the 2 attachments. Also comes with wall hanger charger and wall adapter.