DeWault Battery Power Supply
cults3d
I designed a top to go on this model: https://www.thingiverse.com/thing:2723049 It allows space for two USB ports, a 12v barrel jack and a switch to turn it on and off. The USB boards I used are here (not an affiliate link): https://www.amazon.com/gp/product/B01HXU1C6U/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1#productDetails The 20v from the battery is stepped down to 12v with the ubiquitous LM2596. These are cheap on Amazon or ebay. I sanded it a bit, wired it all up, screwed it on, and Bob's your uncle!
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