Super dead battery - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 9 (permalink) Old 10-13-2008, 02:27 PM Thread Starter
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Super dead battery

I've got a MF battery that is down to 0.9V ..I left he headlight on all weekend
I've had it on a charger for an hour and there appears to be no change. The charging light comes on so as far as I know the charger's working. I've never had problems with it before but I've never tried to charge a battery this dead.

Anyone have some insight on this? Should I expect it to charge in 24 hours? Is it going to charge at all?
I used this same charger to charge this battery when I got it (had to mix the goo myself). So I assume it can do it again.. I hope.
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post #2 of 9 (permalink) Old 10-13-2008, 02:31 PM
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If it is down to .9v you have drained the battery beyond its safe level and since it is not taking a charge, it is most likely toast. Most batteries have a minimum voltage per cell that you shouldn't go below or if you do, only for a very short time. I'm not sure what the min is for an AGM type MF battery but I would suspect it is in the range of 1.2-1.5 volts per cell for a total of 7.2-9.0 volts.

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post #3 of 9 (permalink) Old 10-13-2008, 04:45 PM
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Originally Posted by Bean View Post
Anyone have some insight on this? Should I expect it to charge in 24 hours? Is it going to charge at all?
I used this same charger to charge this battery when I got it (had to mix the goo myself). So I assume it can do it again.. I hope.

You are going to need a new battery...sorry dude.

I think a MF that goes below 8 volts is considered DOA.


How'd you leave the headlight on? Leave the key in it and use the kill switch to cut the engine?



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post #4 of 9 (permalink) Old 10-13-2008, 04:56 PM
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That's pretty much the same boat I am in..
Battery drained down to nothing and now won't take a charge. Correction, It starts to charfe and as soon as it warms up a bit the bad cell/plate kicks in and it goes back down.
New battery is on order. I found a local dealer that had one listed on their website for $56 so I ordered! (Yuasa Maintenance free too) Seems they had neglected to update their prices so we will see when it comes in.. They advertised for that amoint, they should hold to it.

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post #5 of 9 (permalink) Old 10-13-2008, 06:38 PM Thread Starter
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Quote:
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I found a local dealer that had one listed on their website for $56 so I ordered! (Yuasa Maintenance free too)
Oh damn that's a steal! Got a link?


..and yes I killed the bike with the switch and left the key in.. all weekend. Thank goodness I live in a nice area!

I just got a crappy liquid battery for $30. That'll get me to work tomorrow but I'm looking to get a MF battery asap. Then I'll use the liquid one as a backup for days like this.

My existing MF battery is still on the trickle charger. It's now up to 1.05V (woo! Progress!). I figure it can't hurt to leave it on there a day just to see what happens. I think I paid like $100 for that thing so if I can recover it I might as well try.
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post #6 of 9 (permalink) Old 10-13-2008, 06:53 PM
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It's sulphated, time for a new one.

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post #7 of 9 (permalink) Old 10-13-2008, 06:55 PM
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Yeap, sounds like my Westco. Two days on the charger and never got above 2V.
Here's the link. I see he still hasn't updated the web prices. I have my order confirmation printed off for when I go to pick it up, but you can also have it shipped to you for about $10. I ordered Saturday and have not heard anything from them yet (ok, so they are closed today). I was told by the other dealer (who wanted $104 for the same YTX14AHL-BS battery) that the dealer may contact me and say they can't order it. Then we will see about how he holds up to truth in advertising.
http://www.kawasakisportscenter.com/...a-ytx4lbs.aspx

*sorry about that.. darn keyboard jumps on me!*

Dianna
Conway, AR
Patriot Guard Rider
2000 VN750 Sere (Serendipity)
1990 GL1500 (Ole Blue)
1986 VN750 EVie (project bike, heavy custom)
VROC # 11628 / 25000-H
ARVROC # 12 Coordinator and Crowd Control
OKVROC # 18 (H)
TNVROC # 45 (H)

Last edited by Dianna; 10-13-2008 at 06:58 PM.
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post #8 of 9 (permalink) Old 10-13-2008, 08:41 PM
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..and yes I killed the bike with the switch and left the key in.. all weekend. Thank goodness I live in a nice area!
OK...let that be a lesson for all you kids out there, Turn the bike off with the Key. The Kill switch is for you to hit when you are going down or in some kind of emergency.

And make sure you do not accidently turn the key to "Park" as this will cause the same fate...


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post #9 of 9 (permalink) Old 10-13-2008, 09:45 PM Thread Starter
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That's the exact same battery I just murdered. It was fantastic up until that happened though. With Winter coming up I didn't hesitate to buy another one. Thanks for that link! Great deal there.

It should arrive by the end of the week. As soon as it get's here I'm pulling this new liquid battery. I'll keep it as a backup. Are there any storage considerations I should worry about?
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