I'm sure someone else wants one of these, particularly if you just need a battery to run a radio in a basic panel.
Glenn had posted some good eBay finds of multiple unit power panels, offering USB ports, Voltmeter and a 12v power point. I couldn't find any with just the first two units so I was going to buy separate USB and voltmeter and install them individually.
But I ran across this little gem, and it has both voltmeter and dual USB ports in one unit. Side benefit is both of the USB ports are 2.1A instead of one being the lower 1.2A port. So I don't need to remember which plug I need to connect the iPad too.
Voltmeter display shines through the plastic face and the cap when closed. No power, no voltmeter shown.
$18 on Amazon.
https://www.amazon.com/gp/product/B01KHRY0WY/ref=od_aui_detailpages00?ie=UTF8&psc=1
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I think our generation doesn't realize it, especially when we look at the industrial revolution of the last few generations, or the "greatest generation". But it's the seemingly small advances in technology and it's integration into our everyday life that really has made it's mark in the world, even if we don't recognize it.