On 11/30/2012 7:32 AM, KenO wrote:
Inherited an Uninterruptible Power Supply (UPS) that was unused for a while so the gel battery is fully discharged.

Do not want to purchase a new gel battery so am interested in trying to revive it.

Did a search and found Battery Life Saver Patent #7374839
http://batterylifesaver.com/how-do-i...-dead-battery/
Patent PDF http://www.freepatentsonline.com/7374839.pdf

found discussion of Battery Life Saver
http://www.rvforum.net/SMF_forum/ind...?topic=22055.0

Am interested in any experience others have had in reviving gel batteries either using Battery Life Saver or any other technique.


Ken

I built a computer controlled charger/discharger. And I have a pulse
generator
that can put out an amp or 50V. I've done considerable experimentation with
recovering many different battery technologies.

Bottom line: Give it up.

While I believe that a pulse charger/desulfator can help prevent
deterioration on a good battery that's rarely used...boat...RV,

Once the battery has been dead for a long time, it ain't coming back.

A UPS is one of the most stressful applications for a battery.
A tiny amount of series resistance will render it useless in that
application.

My UPS battery isn't completely dead, but it can keep my system up
for 15 seconds or so.
Since the typical outage is less than a second, it's not worth replacing
the battery. Outages longer than a second are likely to be longer than
any ups can handle. But might give you a chance to shut down the system
gracefully.

For most of us, a UPS is overrated. If you really need it, spring for
a new battery.
If not, send it to recycle.