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I needed to make another 9V USB plug for my boot heaters. While I was at it I made a 12V plug as well in case I want to run my gloves extra hot some time. I probably won't be able to run them at full power on 12V.
Also used thinner wire for these two 24 ga instead of 22. And I'm all out of good power connectors. Ordered some more from Mouser which had a lower order threshold for a price drop from $2 ea to $1.60 than digikey.