On 29/06/2017 15:30, rickman wrote:
> David Taylor wrote on 6/29/2017 3:33 AM:
[]>> Rick,
>>
>> This one (or similar) on Amazon US claims to be a UPS, and just needs 6
>> 18650 batteries.
>>
>>
>>
https://www.amazon.com/Feamos-Mobile-Battery-Charger-Universal/dp/B01H52KI70/re
f=sr_1_2?ie=UTF8&qid=1498721130&sr=8-2&keywords=power+bank+ups#Ask
>>
>>
>>
>> but also mentions a 1-second gap.  Sigh!
>
> I assume you mean when disconnecting the input power it takes 1 second
> to restore power to the output?  I didn't see anything that mentions
> that.  I did see one review that said it can't generate output voltages
> above 12 volts when being charged, but that wouldn't be a problem for
> the rPi.
>
> Seems this unit has a buck converter to generate voltages below 12 volts
> and a separate boost converter for voltages above 12 volts all selected
> by a pair of slide switches.  I am guessing the boost converter is
> reused for the charging circuit so the higher voltages are not available
> when charging.

The unit has a 5V/2.1A USB outlet, which I would expect you to use for
the RPi.

--
Cheers,
David
Web: http://www.satsignal.eu

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