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Date: Sat, 29 Nov 2014 11:34:05 +0800
From: Erich Dollansky <erichsfreebsdlist@alogt.com>
To: Michael Sierchio <kudzu@tenebras.com>
Subject: Re: OT: UPS for FreeBSD
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Hi,

On Fri, 28 Nov 2014 17:26:03 -0800
Michael Sierchio <kudzu@tenebras.com> wrote:

> I've always found it amazingly absurd that you use a UPS (a bank of
> batteries charged by AC->DC conversion), invert it back to AC, which
> gets converted to DC for the motherboard and peripherals.

a long time, this was not the case. It was the time when linear power
supplies were the standard. A batterie was supplying electricity via a
diode to the DC input of the voltage regulator.

As switching voltage regulators use a few hundred volts, it is a bit
difficult to match this with a battery.

Erich