On May 23, 4:46 pm, navti wrote:
AGM Leisure battery 110AH arrived flat
I would return them, salesman lied...

If you wanna test them then:
1 charge them up, use boat charger
2 discharge them, w/a constant load [I'm sure you have an ammeter in
your boat?] Just turn on all the lights, note amp drain on meter.
3 multiply Amps times hours of discharge untill batt is 11V [some will
argue about 11V as "batt=dead"] [note: permanent damage if you go
below 10.5V]
4 If less than 110, return to seller!

You can of course repeat this procedure a few times to see if you get
better results each time, if no Major improvement on second go'round,
stop wasting time...

When testing out of boat, I use an automobile headlamp non-halogen,
they're usually 7-12 amps [you need to measure this with an ammeter].

tom
=-==

tlindly wrote in news:1180095084.932902.130030
@z28g2000prd.googlegroups.com:

[note: permanent damage if you go
below 10.5V]


It arrived at ZERO! You're absolutely right....this puppy is TOAST! Why
try to charge a "PERMANENTLY DAMAGED" AGM battery?

SEND IT BACK!

Larry
--
Grade School Physics Factoid:
A building cannot freefall into its own footprint without
skilled demolition.

On May 25, 4:14 pm, Larry wrote:
tlindly wrote in news:1180095084.932902.130030
@z28g2000prd.googlegroups.com:

[note: permanent damage if you go
below 10.5V]

It arrived at ZERO! You're absolutely right....this puppy is TOAST! Why
try to charge a "PERMANENTLY DAMAGED" AGM battery?

Just to prove it to yourself


SEND IT BACK!

Yep, that's easier...


Larry
--
Grade School Physics Factoid:
A building cannot freefall into its own footprint without
skilled demolition.

after 18 hours if charging they are at 12,54 volts,

any thoughts ?

* navti wrote, On 5/27/2007 8:20 AM:
after 18 hours if charging they are at 12,54 volts,

any thoughts ?


Voltage is almost meaningless. That seems a tad low, but it depends
on a number of subtle factors. Also, what was the charge rate? You
mentioned trickle charging, so they might not be fulling charged yet.

You need to charge them with a proper charger, then do some sort of
load test - that's the only thing you can do to determine the health.
Someone suggested a high intensity lamp, you could also use an
inverter with a heating appliance. Or you could take them to a
friendly battery shop or garage that might have a proper load tester.

"navti" wrote in message
ps.com...
after 18 hours if charging they are at 12,54 volts,

any thoughts ?


Sounds like things are looking up. I'd try to get ahold of a good
battery charger of the three-stage variety and put a good float charge
on them (the last stage). Then do a load test to check capacity. You
just might be OK in spite of what all the ignorant,
self-appointed-expert naysayer's ranting raving. I hope it works out for
you. If so please keep in touch and let us know so the know-it-alls can
get slapped around a little bit more...

Wilbur Hubbard

On May 27, 9:20 am, navti wrote:
after 18 hours if charging they are at 12,54 volts,

any thoughts ?

Do you have any idea at what rate you are charging? I don't remember
you mentioning if your charger puts out 2 amps or 10 or 20 or what.
Did you take this voltage measurement with the charger connected and
charging? Or had you disconnected the charger first? Did you put a
small load on the battery for a short time after charging to take off
the surface charge before testing the voltage?

On May 28, 11:52 pm, "Ken Heaton, Cape Breton Island, Nova Scotia"
wrote:
On May 27, 9:20 am, navti wrote:

after 18 hours if charging they are at 12,54 volts,

any thoughts ?

Do you have any idea at what rate you are charging? I don't remember
you mentioning if your charger puts out 2 amps or 10 or 20 or what.
Did you take this voltage measurement with the charger connected and
charging? Or had you disconnected the charger first? Did you put a
small load on the battery for a short time after charging to take off
the surface charge before testing the voltage?

I think I was charging at 7 or 8 amps. I am going to do some more
charging today. My charger can put out 10 or 20 amps.
I charged at 10 but had other loads on the generator (yes i charged
with a generator because thats how i will be using them).
I took the reading after 24 hours of settling,
THats a very good tip regarding the surface charge,
I will try that after my next charge,

On May 27, 12:20 pm, navti wrote:
after 18 hours if charging they are at 12,54 volts,

any thoughts ?

Is that;
1] 12,54 volts with charger still attached and charging?
2] 12,54 volts with the battery connected to nothing but a digital
Volt meter?
3] 12,54 volts with the battery now "running" 3-15 amps [whatever
your normal boat's usage is]?

If 1, you definitely have a bad cell [or your charger is broken].
Should be 13.6-14.4 [14.4 at the start {batt. dead} to 13.6 trickle
charging the fully charged batt.] unless you have a 'smart charger' or
reconditioner
If 2, This is totally meaningless data, all that most people ever know
of batteries, and how battery salesmen make their fortunes...[this is
"surface charge" you might have heard of...]. In a liquid battery,
this should stay at 13.6 for quite some time after removing the
charger [AGM's, with their inherently defective chemical nature
pointed out so eloquently by {I believe} Larry earlier, will usually
show something less depending {I reckon} on their quality], But even a
battery with a known dead cell can show this phantom voltage, so pay
it no heed!!!
If 3, looks promising. You still have to do the discharge test [run
10 amps for 11 hours, or 2 amps for 55 hours] to know if 110aH battery
is "good"

On May 29, 8:38 am, tlindly wrote:
On May 27, 12:20 pm, navti wrote:

after 18 hours if charging they are at 12,54 volts,

any thoughts ?

Is that;
1] 12,54 volts with charger still attached and charging?
2] 12,54 volts with the battery connected to nothing but a digital
Volt meter?
3] 12,54 volts with the battery now "running" 3-15 amps [whatever
your normal boat's usage is]?

If 1, you definitely have a bad cell [or your charger is broken].
Should be 13.6-14.4 [14.4 at the start {batt. dead} to 13.6 trickle
charging the fully charged batt.] unless you have a 'smart charger' or
reconditioner
If 2, This is totally meaningless data, all that most people ever know
of batteries, and how battery salesmen make their fortunes...[this is
"surface charge" you might have heard of...]. In a liquid battery,
this should stay at 13.6 for quite some time after removing the
charger [AGM's, with their inherently defective chemical nature
pointed out so eloquently by {I believe} Larry earlier, will usually
show something less depending {I reckon} on their quality], But even a
battery with a known dead cell can show this phantom voltage, so pay
it no heed!!!
If 3, looks promising. You still have to do the discharge test [run
10 amps for 11 hours, or 2 amps for 55 hours] to know if 110aH battery
is "good"

2 at present. I will try 3 and get back to you,.
ps
its not a boat its a camper-van