[time-nuts] Re: Help needed with a UPS for my GPSDO

[Forrest Christian (List Account)]

Every APC UPS I've seen connects the batteries in series up to 24V.   Above
that, the battery voltage is either 24V or 48V depending on the model.

If you search for the UPS model number and "replacement battery" you'll
find a lot of third party vendors with pictures and often specs of the
battery.

On Mon, Jun 26, 2023, 12:14 PM Dave via time-nuts <time-nuts at lists.febo.com>
wrote:

> Hi, I managed to find two second hand UPS at a ham rally but neither had
> a battery pack in it
>
> One, an "APC backups-ups 400"  works well with a single 12V 7Ah sealed
> lead acid battery.
>
> The other, an "APC SMART-UPS 600" seems to have space for two batteries.
>
> I have found a manual for the "600" unit but it mentions nothing about
> the number of batteries or if they should be connected in series or
> parallel :-(
>
> Has anyone any experience of these ??
>
> Any help more than welcome.
>
> Regards,
> Dave
>
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