Battery tender questions - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 11 Old 12-17-2013, 02:48 PM Thread Starter
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Battery tender questions

Hey All,

Just wondering, my Vee spends the winter in my garage, lightly heated, never below zero.

My previous bike had the tender wire hard wired onto the bike, so during the Summer and the winter I would plug it in.

I was thinking of doing the same thing with the Vee, hard wiring (meaning attaching the tender lead to the battery and routing it under the seat to the exterior), and just plugging her in for the winter without unplugging the battery from the bike.

Any thoughts? I know the ideal way is to remove the battery, etc, but I can't see any harm in just plugging it in?

Thanks!

2009 Vee
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post #2 of 11 Old 12-17-2013, 03:00 PM
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I am not sure of the "harm" question. I ride my Vee all year long but did park my Harley for the season. The Harley (newer model with EFI and computerized crap) has a hard wired plug for a tender. I used it routinely without issue.

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post #3 of 11 Old 12-17-2013, 03:02 PM
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That's all I do. As far as I can tell, that's how the Tender is designed to be used. What's supposed to be the advantage of disconnecting the battery from the bike?
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post #4 of 11 Old 12-17-2013, 03:08 PM
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don't remove the battery from the bike

don't remove the battery from the bike - its not necessary
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post #5 of 11 Old 12-17-2013, 05:41 PM
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Quote:
Originally Posted by kiwi_outdoors View Post
don't remove the battery from the bike - its not necessary
Yes, just add a pigtail to the posts which will make it accessible from the outside. The Battery Tender comes with a pigtail and quick connect plug. Couldn't be easier.

Keep the battery plugged up to a tender to prevent a totally dead condition which can damage cells and ruin its ability to be charged. Think of it as a electrical maintenance item. Mine is left on all year whenever riding is not planned.

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post #6 of 11 Old 12-17-2013, 06:09 PM Thread Starter
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Thanks guys, what I thought but just wanted to make sure!!

2009 Vee
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post #7 of 11 Old 12-17-2013, 06:52 PM
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*Technically* the best way is to remove the battery for long term storage. It's especially important with conventional lead acid batteries. We don't have those as such, but your battery still has corrosive acid in it, and if anything compromises the battery enclosure it's better to have it sitting on a garage floor than in the bike.

Now, having said that, I don't know too many folks that actually take their batteries out. I will take them out only if the bike will be sitting for longer than 3 months. My 1978 KZ650 doesn't get ridden much, so its battery is sitting on a tender out of the bike. The V-Strom has a tender plug dangling off of it, but it never sits longer than a week. I really wouldn't be concerned about just leaving it plugged in, but you may want to check on it every week just to make sure nothing horrendous has happened.

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post #8 of 11 Old 12-17-2013, 11:18 PM
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Here's a chart showing the freezing point of a lead acid battery vs. the voltage:



You only need to keep the battery charged up to the point where it won't freeze. A trickle charger will do the job, even if it is just plugged in one day a month, or whatever it takes to keep the voltage up.

By the way, "tender" is a trade marked term from the Deltran Corp., makers of Battery Tender® brand chargers. It does not matter if the battery is charged in place or charged elsewhere.

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post #9 of 11 Old 12-18-2013, 09:46 AM
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If you leave the battery connected, not an issue, just remember on a lot of bikes there is a small parasitic draw to keep the clock going and your trip odometers maintained. So, it will discharge the battery over time.

A fully charged battery is 12.7-12.8 volts, half charge is 12.3-12.4. If a battery is discharged to below half a half dozen times or so, sulphation sets in... of course, the longer that sits in that condition it isn't good.

There are debates whether one should leave a Battery Tender hooked up ALL the time, I prefer to unplug for a couple of weeks, but I have left it plugged in all the time also with no ill effects. I imagine the only concern is if the Tender malfunctions in some way, but very reliable so I don't worry about that too much.

The Battery Tender Jr. will have a tough time having enough ooomph to recharge a dead battery, so I'd only use that on a decently charged battery.

Properly maintained, a AGM battery should last 5 years unless it's being cooked constantly in a hot climate. Heat is the enemy.

Along the lines of PTRider's comments, you can disconnect and fully charge a battery, put it into freezing cold storage with nothing connected and it will stay charged for a fair long time. Check with a voltmeter once a month and you should be good to go.
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post #10 of 11 Old 12-18-2013, 10:43 AM
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Quote:
Originally Posted by Bstrom650 View Post
Yes, just add a pigtail to the posts which will make it accessible from the outside. The Battery Tender comes with a pigtail and quick connect plug. Couldn't be easier.

Keep the battery plugged up to a tender to prevent a totally dead condition which can damage cells and ruin its ability to be charged. Think of it as a electrical maintenance item. Mine is left on all year whenever riding is not planned.
Like Bstrom said, my Battery Tender Junior came with a pigtail that I keep attached to the battery. I just connect the quick connects when it is needed (winter) and disconnect and zip tie out the way the rest of the time.

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