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portable power

  1. I

    Total newbie. Help designing wearable circular heating container charge via usb or dc

    I am trying to figure out how to make a portable heating pad container holder about the same dimensions as this item - https://www.amazon.com/Munchkin-Travel-Baby-Bottle-Warmer/dp/B006SFUD2G/ref=cm_cr_arp_d_product_top?ie=UTF8 - i linked to. That can be charged via usb and dc, then worn...

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