NEW MF-AGM battery woes - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 9 (permalink) Old 02-18-2009, 07:10 PM Thread Starter
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NEW MF-AGM battery woes

I just purchased a MF-AGM battery made by EAST PENN MFG. Got it up the street at Advantage Auto Parts. (part number ETX15L)

When I got it home I checked standing voltage, 7.95 V, which seemed far too low!

I returned it and swapped it out for a second one that read better, 11.90 V.

I slow-charged that one overnight, on a smart charger. The next morning the charge was terminated at 13.8 V. After letting the battery standing for 12 hours, the voltage then read 12.6

Isn't a new AGM supposed to read standing 12.7 to 12.8 volts if new and accepting a full charge?

I am concerned that the battery may not give great performance if it did lay around on their shelf for possibly a year or more and remain low for an extended time.

Their warranty is 12 months full exchange and second year pro-rated exchange.

Any help or recommendations are appreciated....
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post #2 of 9 (permalink) Old 02-18-2009, 07:18 PM
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The 12.6 sounds fine to me. Put that thing in and put some miles on it. The check the terminal voltage after it has been through your charging system.

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post #3 of 9 (permalink) Old 02-18-2009, 07:43 PM
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The voltage is where it is supposed to be, you will be fine.


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DEKA MF AGM ETX15L

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post #4 of 9 (permalink) Old 02-18-2009, 08:12 PM Thread Starter
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Thanks guys, I did get that information at batterystuff.com,

in their FAQ section <snip> :

What should the standing voltage of my charged battery be?

Standing voltage, or resting voltage, is measured when a fully charged battery is allowed to set until the surface voltage acquired during a charge cycle has dissipated. This takes about 12 hours. At this point, a fully charged lead-acid type battery would measure 12.7 to 12.8 volts for a 12 volt battery. Some high performance AGM batteries may measure even higher.

Intend to install the new 12.6 V MF battery soon, then post an update in the upcoming days.

Presently there are no starting issues with the wet acid battery currently in the bike. Thanks for any and all input!

Regards,
Daniel
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post #5 of 9 (permalink) Old 02-18-2009, 09:02 PM
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I got my MF Battery at Sears, figured I couldnt' go wrong with a Diehard, and I was right. No worries on the acid leaking, holds a charge forever (so it seems), and it starts immediately every time. Couldn't say that with the wet cell battery. I've had mine for 6 months and have had zero problems, won't go back to wet!

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post #6 of 9 (permalink) Old 02-20-2009, 07:50 PM Thread Starter
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I installed my new MF-AGM and have a few observations :

1. The engine seemed to start quicker, it had more oomph while cranking.

2. Headlight was quite a bit brighter at idle.

3. The swap-out took just a few minutes to do, the new battery was a
tad smaller than the 14L-A2 standard flooded battery, so it fit in easily.

4. Didn't have to fiddle with an overflow tube.

5. My MF-AGM has extra connections on it for add-on leads.

6. I will likely never ever go back to the standard flooded battery again.
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post #7 of 9 (permalink) Old 02-20-2009, 08:09 PM
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Quote:
Originally Posted by rccrashburn View Post
I installed my new MF-AGM and have a few observations :

1. The engine seemed to start quicker, it had more oomph while cranking.

2. Headlight was quite a bit brighter at idle.

3. The swap-out took just a few minutes to do, the new battery was a
tad smaller than the 14L-A2 standard flooded battery, so it fit in easily.

4. Didn't have to fiddle with an overflow tube.

5. My MF-AGM has extra connections on it for add-on leads.

6. I will likely never ever go back to the standard flooded battery again.
Those are good batteries, you will get years of use from it. Did you get the Deka?


85 VN700 "Old Yella"

REBUILT ENGINE
CUSTOM PAINT
VANCE & HINES CRUZERS
EAR SHAVED AND RE-JETTED W/K&N'S
DUNLOP ELITE K591 FRONT & REAR
VOLTMETER
SYNTHETIC BRAKE FLUID
SYNTHETIC OIL & GEAR LUBE
PLEXISTAR 2 WINDSHIELD
SPLINES LUBED
ACCT'S GREASED W/TOC SPRINGS
COASTERD
LEATHER SADDLE BAGS
LEATHER TOOL AND ROLL BAG
PICKUP COILS GAPPED AT .018"
NGK CAP, WIRES, IRIDUMS
BARNETT FRICTION PLATES & SPRINGS
CUSTOM GRIPS, MIRRORS, LEVERS
ORIGINAL STATOR & R/R 14.5v
DEKA MF AGM ETX15L

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post #8 of 9 (permalink) Old 02-21-2009, 06:18 PM Thread Starter
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The name on it is East Penn Manufacturing, they are made here in the USA. They make Deka too, I think, as well as other labels. The part number is ETX15L, and descriptioon it is Magna Power MF-AGM battery. It was purchased from an Advance Auto Parts Store here in Houston Texas and has a 12 month free replacment warranty plus an additional 12 months pro rated exchange warranty. I'm keeping my receipt just in case. But so far so good. Out the door it cost $74.59. They have the Iridium plugs there too and they run $6.99 apiece.
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post #9 of 9 (permalink) Old 02-21-2009, 08:55 PM
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I got the interstate AGM battery, and have nothing bad to say. I had not started her up since Thanksgiving and just 2 weeks ago cranked it up, no problems. I won't go back either.

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