I have Dirt Devil Scorpion Turbo electric. It is about 8 years old and running like the day it was new. Still using the same filter too! I just vacuum the filter at the end of the day with my house vac and good to go. Not sure if I can find another filter if that one finally goes South.
I magivered (sp?) A fifty foot extension cord straight to the switch so no one borrows just the cord when the vacuum is idle. Works pretty good I guess once I figured out to vacuum the track then wash the window. So much easier dry.
I’m still using the black and decker, but the filter is totally hosed now. I could buy a new one, but the issue is with all the fine sand we have here a new filter wouldn’t last long.
So what I do is if I only have a few windows to do is drape a wet microfiber cloth over the outlet to prevent it from spewing dust everywhere. If I’ve got a lot of windows to do, I put the vacuum at the bottom of my tool bucket (organizer by Home Depot) and then drape the microfiber over the vacuum outlet. With the bucket + microfiber, I don’t have to worry.
Brush all the dust into a little pile, quick on quick off and done. Like this the battery will give me a couple of med-large houses.
I use a Dewalt handheld wet/dry shop vac. Added bonus: battery powered, great for when I do residentials without electricity on, or to just save myself working around plugs and cords.