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From: bp@www.zefox.net
Newsgroups: sci.electronics.repair
Subject: Re: Tripp Lite BCPERS450 UPS
Date: Mon, 19 May 2025 15:05:13 -0000 (UTC)
Organization: A noiseless patient Spider
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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