>>1932748The Klein meter was like $15 from Home Depot. It’s cool to have to make sure USB devices are charging correctly, plus you can see the battery capacity on devices and find out if the chinks are being honest or not with the specs.
The parts are all on Amazon, that stuff is way cheaper on Ali if you can wait. Pretty much anything that runs off 3x AA or AAA or C or D cells seems to do fine running off a single lithium cell (at least with my limited fuckery in my garage). The USB charging boards are like $1ea from Amazon. The lithium cells are from power tool batteries or power banks. It’s pretty basic as far as electronics go.