For the 5V to 12V step up, this is just one link: https://www.amazon.com/12V-Voltage-Step-...
There are probably 5-10 different vendors on Amazon and Ebay.
Great. Please let us know at bunnypapr.org (or info. AT. bunnypapr.org)
See Step #31. 5V to 12V step up is implemented.
Not necessary if using Step 31. Step 31 is zero soldering.
5V to 12V step up, with 5.5mm x 2.1mm plug. https://www.amazon.com/HiLetgo-Convert-V....
Any 5V USB battery pack that can do 1A of power. Recommend 10000mAH. Anker is a good brand.
Screw connectors (to avoid soldering): https://www.amazon.com/inShareplus-Barre...
Recommend 10000mAh USB Battery Pack. The really cheap ones may overheat. Recommend a quality unit, possibly with UL certification or other certification.
Recommend rewriting this section to include an alternative setup:
USB battery pack to ($10 to $20)
5v to 12V step up with 2.1mm jack ($4 retail, ebay)
screw-connectors for 2.1mm female jack (or your barrel connectors)
Ask @emno for a set of pictures for that setup.
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