On 2019-06-19 12:33, Mike Scott wrote:
> On 18/06/2019 09:34, Mick Manning wrote:
>> On 18 Jun 2019, Lew Pitcher said the following...
>>     LP> Outside of the smarts, and the DC-AC converter, they seem to
>> be capable
>>   LP> of acting as a UPS for a Raspberry PI. Just plug the Pi into the
>> battery
>>   LP> pack's DC output port, and the wall wart into the battery pack's
>> charger
>>   LP> input port.
>>
>> What a GREAT idea. Thanks. :-)
>
> On the down side, I've heard it said that some won't supply power while
> they're charging themselves. I have no idea if that's true or not, but
> it has rather put me off the idea :-{ Can anyone confirm/refute this?
>

Can this be fixed with having two in parallel ?

Both attached to the Pi and having a device (relays or something) to
see that only one is loaded at a time, and switch every hour or so?
(shutting of loading for both , wait a sec or two, and then turn on
loading for the other one)

     /----- battery ----- Relay I  --- Wallwart -- wall
 Pi--
     \----- battery ----- Relay II --- Wallwart -- wall

Pi should control the relays


--
--
Björn

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