Mark,
Can you expand on your term, "sealed lead acid?" Not sure what you mean.
Wet cells, AGM, and Gel cells are all "sealed lead acid" batteries from
my research.
What sort of differences do you mean?
Sizing is same.
Listed capacity and AH rating seems to be the same.
Have noticed that the orientation of the PLUS and MINUS terminal
positions follow no spec. This can be a problem if the UPS connection
wires are too short to fully span the battery compartment. This is a
limiting factor in my Belkin UPS battery replacement ATM.
But, so far, I am leaning toward AGM (Absorbed Glass Mat) batteries for
my UPSs. They seem to give better life over time; even though AGM
batteries do not like to be discharged beyond 50%. This can limit their
life span so I've read. I have not yet seen this in practice however.
Since 2006 I have now lost all of my replacement Gell cell batteries.
Possibly because all of them have been fully discharged/recharged
several times.
I have dug around and asked APC what technology they spec for their
batteries. APC does not say. But, they are truly "sealed lead acid"
batteries. And carry a premium price.
Best,
Duncan
mark.dodge wrote:
Have you noticed any difference between the solid gels and the sealed lead
acid???
-----Original Message-----
From: hardware-boun...@hardwaregroup.com
[mailto:hardware-boun...@hardwaregroup.com] On Behalf Of DSinc
Sent: Wednesday, July 01, 2009 10:39A
To: hardware@hardwaregroup.com
Subject: Re: [H] Sometimes they're just out to get you
Chris,
That makes a lot of sense now that I think back. In SoCal, I only recall
1 external event which caused battery intervention (other than the
internal test every 2 weeks of use).
However, here in NW Georgia, all my UPS's have seen numerous external
events since 2004 that required battery intervention. Several of these
were very early morning (nap-time) that did almost fully deplete the
batteries. So far, no lost equipment! So, I'll be happy with a 3yr
replacement cycle for now; but, I will switch to Yuasa batteries!
Best,
Duncan
Christopher Fisk wrote:
On Tue, 30 Jun 2009, Christofer Fisk wrote:
It depends on usage. If you never have a power failure the batteries
will last a lot longer than if you use them a lot.
What you should try to do is to make sure they never never NEVER go
under about a 60% charge.
Get a battery under 60% and they never really recover.
Christopher Fisk
