You can replace the small battery with a larger one. If your existing
UPS has a 12v 7AH battery, replacing it with a 12v 60 AH battery (deep
cycle, not auto) will extend your run time about 8 times. It will not
increase the output power (watts or VA). The big issue is the charging
current being limited. Most OPSs with small batteries limit the charge
current to 250 ma. (1/4 amp). The down side is it will take the the
battery 240 hours to return to full charge after a long outage. Most
UPSs today are designed to allow you enough time to gracefully shut down
your computer, not to keep it running. Put a fuse rated at less than
the internal fuse ON THE BATTERY. This way, if there is an over current
condition, you can replace the easy/inexpensive fuse instead of the hard
to reach/not inexpensive fuse. Putting the fuse on the battery protects
the battery wires and connectors. Use wire the same size (gauge) or
larger as the wire going to the existing small battery. Don't let the
length be more than about 3 feet.
Hope that helps,
john
On 12/11/2015 02:15 AM, AndyHC wrote:
The router has got a small UPS but it only lasts for about 20 mins -
and being on a rural power supply we do very occasionally go down for
longer - but your suggestion has given me an idea: I have a larger ups
in the garage that is now hardly used, I'll see if I can't run a sort
of reverse PoE back to the router or to back-up the small UPS. Cheers.
On 10/12/2015 23:47, Andrew Stirling wrote:
then put in a UPS
Kind regards
Andrew Stirling
01250 870397 / 874580
07910467915
[email protected]
http://www.calcpay.co.uk
On 10/12/2015 16:46, Andy wrote:
but just occasionally, when a power outage manages to put the router
into cripple mode,
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
[excessive quoting removed by server]
_______________________________________________
Post Messages to: [email protected]
Subscription Maintenance: http://mail.leafe.com/mailman/listinfo/profox
OT-free version of this list: http://mail.leafe.com/mailman/listinfo/profoxtech
Searchable Archive: http://leafe.com/archives/search/profox
This message:
http://leafe.com/archives/byMID/profox/[email protected]
** All postings, unless explicitly stated otherwise, are the opinions of the
author, and do not constitute legal or medical advice. This statement is added
to the messages for those lawyers who are too stupid to see the obvious.
