Although the weather prevented me from using the jacket in high temperatures I was happy to know that my 18th -V-Makita rechargeable batteries combined with B. a Makita cell phone adapter, take up the jacket's USB port and allow the user to take full advantage of the three-speed green control box that comes with the jacket. The Makita adapter features a belt clip for weight distribution, eliminating potential issues with a lightweight jacket. I redirected the USB port from my jacket pocket to a Makita battery/adapter combo that attaches to my belt under my jacket. Another benefit is that the location of the fans on the back of the jacket is such that you can wear them when working on backrest equipment. This is not always the case with other brands. I wear an XLarge shirt and ordered an XXLarge jacket which fits but doesn't have much room. I will update this review as soon as I have the opportunity to use the jacket in high temperatures.
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