From Newsgroup: sci.electronics.repair

The UPS has always been plugged in a A.C. outlet but one day I presses the Power On button and it didn't come on.

Would replacing the Battery correct this problem?

Once, years ago I replaced its Battery.

Thanks
Ed
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From Newsgroup: sci.electronics.repair

Ed Vance <Ed.Vance@f10.n1.z11969.fidonet.org> wrote:

The UPS has always been plugged in a A.C. outlet but one day I presses the Power On button and it didn't come on.

Would replacing the Battery correct this problem?

It might, but I'd start by simply measuring the battery voltage.
If it's ok, a new battery seems unlikely to help by itself.

The inverter/charger units I have won't do anything at all
without a live battery and they're configured as UPS units.
The battery needn't be good, but can't be stone-dead.
HTH,

bob prohaska

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From Newsgroup: sci.electronics.repair

On Sun, 18 May 2025 22:04:30 +1200, Ed.Vance@f10.n1.z11969.fidonet.org
(Ed Vance) wrote:

<https://tripplite.eaton.com/bc-personal-120v-450va-280w-standby-ups-tower-usb-port-3-outlets~BCPERS450>

The UPS has always been plugged in a A.C. outlet but one day I presses the >Power On button and it didn't come on.
Would replacing the Battery correct this problem?
Once, years ago I replaced its Battery.

DOes the 115VAC input have power?
Did you check the UPS fuses?

How many years? Batteries don't last forever. The Gel or AGM
batteries used in such USP's typically last about 5 years before they
begin to deteriorate. Testing the existing battery before replacing
is cheaper than buying a new battery and discovering that the problem
is elsewhere. This might help:
"How to Tell If a GEL Battery Is Bad and How to Test GEL Batteries?" <https://www.renogy.com/learning-center/solar-battery-troubleshoot-maintain/gel-battery>

Bulging electrolytic capacitors can also mimic the same symptoms. The
unit works fine for years. Then one day, it loses power and won't
turn back on again. Look for electrolytic capacitors with bulging
aluminum tops, blown out rubber seal near where the leads come out, or
leaking electrolyte from somewhere: <https://www.google.com/search?q=bulging%20capacitors&udm=2>
An ESR (equivalent series resistance) meter might be useful for
testing the caps.
--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558
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From Newsgroup: sci.electronics.repair

On Mon, 19 May 2025 17:56:32 -0700, Jeff Liebermann <jeffl@cruzio.com>
wrote:
(...)

Also, some really bad advice. Don't fix it this way:

"What to do if the capacitor is swollen? }*{Capacitor Replacement
Tutorial"
<https://www.youtube.com/watch?v=BUOZDkLqlpU>
--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558
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