On 11/30/2012 10:32 AM, Bob F wrote:
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.


I'd search for a source of re-cycled used batteries. Many users recycle them
after some # of years, and the batteries are still usable in many cases. I've
goten several usable ones at a local metal recycle center that happens to be
good about selling cheap batteries they've taken in.


Hospitals are required to change batteries in life-saving equipment on a
regular schedule. That seeks to make sure the stuff works when it's needed.
People who work for hospitals take them out of the dumpster and to
swapmeets.
I've NEVER bought one that was worth a damn.
For low drain apps, maybe they work ok. For high drain apps
like a UPS, they've been universally unsuitable.

You might have better luck if you get closer to the source.
By the time they get to a swapmeet, they've been cherry-picked
multiple times.

If you've got a standard 7AH 12V battery, just go spend $20 and be
done with it. It's not worth the hassle.
But do buy one from a high volume dealer. One that's been sittin'
on the shelf for two years is not what you want.
And if you buy off EBAY, you never know what you'll get.