Thanks Giles and Dustib80.
The key to building these is to find the parts needed. All can be found on Amazon and E-bay. There is a guy on E-bay that even sells the plans to build them, or you can buy his kit or his pre soldered kit there. What are they? An on/off switch, a small computer type fan to keep things cool, an ozone plate with transformer, a connector to run the electricity through the switch to the fan and the ozone plate with transformer, a 12v battery, and a box to hold the stuff.
I will post a picture of mine later.
Issues you will face. Small batteries don't last long. Most of them come from China and while all marked the same capacity, they don't all perform the same- even from the same source. You will want your wires from the battery to connect easily to the unit via a universal plug, which you will also want to connect the same way to your recharging source. I took a 110v to 12v plug and wire set up with the same universal quick connect to match everything, so I can charge the batteries or run the unit from a wall outlet so I can de-scent my clothes at home in a closet or at camp in a shower stall. I also took a cigarette lighter adapter charging wire set up so I can run the unit in the vehicle to de-scent the vehicle as well as charge the battery on the go! Adaptability is the key!
For most folks, just go to E-bay and buy the plans or kit from him. Here is the link, and no it is not me, nor am I a part of his food chain. You might save an additional $20 bucks by gathering the stuff yourself. But if you aren't an 8 year old tech savvy kind of person who programs all my electronics for me since I can't even turn on the tv any more...he has already saved you most of the cost.
https://www.ebay.com/sch/redfoxtrapper/m.html?item=202098779636&rt=nc&_trksid=p2047675.l2562
Mine is remarkable similar to his. These are the type of batteries he uses:
https://www.ebay.com/itm/DC12V-9800...ery-Pack-JB-/322790009017?hash=item4b27c8a8b9
But they only last 2-4 hours. They are light to carry, but I just went from them to this and it lasts me all day:
https://www.ebay.com/itm/Mighty-Max...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649
It's cheaper but weighs 4 pounds maybe? I hunt mostly from ground blinds though. The ozone machine itself might weigh a pound if that.
I'll take some pictures of mine and put them up soon for ya all.