Rob Morley wrote on 10/23/2017 7:16 AM:
> On Mon, 23 Oct 2017 00:53:31 -0700
> Big Bad Bob  wrote:
>
>> There are a LOT of usb power with LiPo or LiIon solutions out there,
>> one of which I saw that was solar powered and capable of driving 2.1A
>> out of the 5V USB power.  So yeah, shop around and see what you can
>> get.  Many are under $20, and apparently under $10.  Some charge from
>> a car OR AC adaptor, some require a USB power adaptor to charge them
>> (and then they'll supply power for other things up to battery
>> capacity).  But yeah, off-the-shelf solutions exist.
>
> The specific problem people are encountering with most of these, and
> which isn't often stated in the product description, is the ability to
> draw power while the device is charging, because that's typically what
> you want from a simple UPS-like thing. Otherwise you might as well get
> some lithium cells, an Arduino and a few other bits and pieces, and
> make a proper one yourself.

I have yet to see one I  would call "proper".  There was one that did
everything it was supposed to do, but it was from Europe and was a bit
pricey.  None of the others would do everything that is really required.

--

Rick C

Viewed the eclipse at Wintercrest Farms,
on the centerline of totality since 1998

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