BTRUI for Dyson V8 Battery Adapter for Dewalt 18V 20V Battery Convert to for Dyson V8 Series Animal Fluffy Motorhead Handheld Vacuum Battery Converter (DW20V8 Adapter)

Product Information

I just soldered on some wires and a switch to the dyson control board that directly feeds the motor of the vacuum and hot glued the 3D printed insert and DeWalt battery attachment with some wires with soldered on terminals. Now I can use my beefy DeWalt batteries, which I haven't rigorously tested, but I am pretty sure last longer than the 17 minutes *cough 10 tops cough* that Dyson advertised for this vacuum. Edit: this video shows how the 20V/60V batteries switch to 60 volts: https://youtu.be/VAmghq7XadQ?t=499. The tool connects pins C2 and C4, and with the switch depressed this changes the mode from 20V between pins B+ and B- to 60V between B+ and B-. In addition to the long run as a tech writer and editor, Jason spent over a decade as a college instructor doing his best to teach a generation of English students that there's more to success than putting your pants on one leg at a time and writing five-paragraph essays. While his days of steering students toward greatness are behind him, his lifelong desire to delight, entertain, and inform lives on in his work at How-To Geek.

What I found a bit annoying is that Dyson uses a switch, that through some mechanical fanciness, eventually hits a button on the control board. So, I just bypassed that and fed DeWalt battery power through a separate toggle switch to the vacuum. It does not fit into the original dyson battery holder. I thought about designing it that way, but I was concerned that there would be some thin bits of plastic that could break when inserting and pulling out the DeWalt batteries... also I didn't need the thing for charging, and it wasn't the best tool holder for us anyhow. Either way, like Brazen-Badger suggestion, it is worth being cautious with mods like these, as the batteries and/or tool could be damaged. I haven't run into any issues thus far (after about a month of use and off). Like Brazen-Badger suggested, a new battery could be made, or the DeWalt batteries could be modded to make a "smart battery" which has a BMS that includes overvoltage, undervoltage, thermal protection, and overdischarge (current limiting) protection. Additionally, circuitry could be added as part of the mod that disconnects the battery to prevent and undervoltage state (3.7V*5=18.5V for lithium ion chemistry).