For me, the battery-powered vacuums do what they say, but you need to fuss them a
lot.
The lever to dump the contents broke after a year, so it works but doesn't stay attached to the handle. I have to be careful opening it to avoid dumping the small bin in the big bin. It doesn't click back on without some force, so you can be pushing it around looking like it's working while there isn't actually a seal, so it pushes the dirt around the floor.
The filter clogs at the slightest provocation, so if you don't wash (and dry) it daily, it will start pulsing uselessly until you do. It doesn't work unless the filter is bone dry.
The high-powered speed busts your eardrums; my children scarper when I use it for even a few seconds and I find it painful. It burns the battery up in under 3 minutes.
So it is fine but there are a lot of trade-offs that you have to learn about.
I still keep their mains-powered vacuum too, which is a lot less stressful. Also because I like pain, their robot Heurist 360, which is generally awesome except for 5% of the time when it gives up in the middle of a run for no obvious reason.