"The Natural Philosopher"  wrote in message
news:rqd0hr$r21$2@dont-email.me...
> On 04/12/2020 08:08, Mike Scott wrote:
>> any suggestions for a good ups for a 24/7 pi server please?
>
> You could do worse than a continuously charged 11V lithium pack or 12v car
> battery  and a 5V switched regulator.
>
> How many amps does a Pi draw?
> How long do you want it to stay up?

I happen to have a large battery that is charged from a 5 V USB charger
(Micro USB input) and supplies 5 V (on a USB-A output). I thought I could
use this as a UPS - particularly to keep a Pi going for brief < 5 second
power cuts that were plaguing our village (overhanging trees touching the
high voltage feed to a substation).

But sadly this battery cuts off its output as soon as either an input cable
is plugged in or 5V is supplied at that input (I forget which), and this
rather scuppers that plan. :-(

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