On Mon, 26 Jun 2017 11:21:58 +1200,
nospam.Rick.Christian@f377.n135.z1.binkp.net (Rick Christian) wrote:

>
>   Hello everybody!
>
>There was some discussion on setting up various USB batteries for a sort of
>PiUPS...
>
>I'd like to get some feedback on the devices that users have found to WORK in
>the  role of PiUPS. Got a setup that needs to have this, and using even el
>cheapo APC AC UPS salavaged from places and Ebay and putting $40 batteries in
>them seems out of line.
>
>Looked at the Amazon Basics 16.1AH USB battery but it cuts off the power ports
>when you charge. Some one there was looking to do exactly what I want, and
>foudn out its useless.
>
>Any one have known working devices, with *US* purchasing options.
>
>Ideally it would have a setup like the Amazon units 2 USB port for power, a
>microUSB for charging...plug Pi into one port, charger into uUSB port, and not
>worry about the stray power glitches... it doesn't even really have to run
that
> long, 5-10 minutes till gen set auto starts.
>
>In my current time frame, plug and play is needed. I don't really have time to
>build something.
>
>Thanks.
>
>
>
>Rick
>
>
>... Ding Dong the Witch is DEAD! I Made America Great Again! President Trump!

I used a dollar store USB power-bank as a pi UPS. Like you say it
doesn't have pass-through  while it's charging so, I added
pass-through by wiring the regular PSU and the power-bank output in
parallel but with a  Schottky diode in series with +ve of the
power-bank output
A separate PSU was used to charge the powerbank, I didn't investigate
if one PSU could do both tasks.
The project consisted of a Pi Zero wifi dongle and 1602 LCD display.
Failover and power restoration  was seamless and it ran for about an
hour on the single 18650 in the powerbank.
--

Graham.
%Profound_observation%

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