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From: nospam.Vincent.Coen@f1.n250.z2.fidonet.org (Vincent Coen)
Newsgroups: comp.sys.raspberry-pi
Subject: Backup power supply
Date: Wed, 13 Mar 2024 16:32:32 +1300
Organization: Agency HUB, Dunedin - New Zealand
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Hello Andriy!

Wednesday March 13 2024 13:18, you wrote to All:

 > Hi,

 > I'm considering adding some backup power supply for my RPi2 mainly
 > to avoid filesystem issues which may be caused by a  short power
 > outage. There are some interesting schematics online as well as some
 > quite cheap 'manufactured' options. But I'm wondering, maybe someone
 > has some experience / feedback to share?

There are some battery powered sub systems/ card available but you are limited
by the capacity of them which is not that great.  For all important computer
systems I use APC smart UPS's connect to a large adaptor block that hold 
around
9 sockets with the APC unit being 1000Va.  I did have a 2k2 VA but the
batteries along with the main board failed and APC do not have spares so 
switch
since then to 1000va units for my and my wife's requirements. The batteries
last around 5 - years before replacement and I have found 3rd party sources 
for
the batteries for around 30 pounds instead of the 100 or so for the same thing
but with APC branding.  It takes less than 5 minutes to swap over and you can
keep the UPS running while doing it.

Note that printers are not connected the the UPS but router and primary hubs
are.  I did for a while also have a Pi3B+ (plus Hard drive) also connected to
it when running 24/7 but switched the jobs over to my main system and
discontinued the Pi despite late last year buying at great effort a Pi4B 8Gb,
240 Gb SSD all in a Argon 40 case to act as a back up but never used it - must
remember to sell in on Ebay.

Vincent