Have I just flattened my battery or killed it for good? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 14 Old 11-11-2010, 07:13 PM Thread Starter
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Have I just flattened my battery or killed it for good?

I left the ignition on overnight all last night and the battery was dead as a dodo this morning. Couldn't jump start it from the car so my beautiful and understanding wife helped me push it up our drive which is on a hill and I tried to bump start it. We had to push it up twice as no luck on the 1st attempt.

I then rode it to work for 45 mins and thought it would have charged up but it's still flat and needs bump starting. Shouldn't the ride have charged it up, or have I killed it for ever? Would buying a batter charger from an auto spares shop do the trick instead?
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post #2 of 14 Old 11-11-2010, 08:26 PM
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You probably would be okay if you had taken the day off and spent 8 or so hours riding instead. Simply put, 45 minutes riding isn't enough to charge it from flat. How old is the battery? Depending on that, you could probably get away with buying a battery charger and leave it on over night. But then no matter what, you'll have that niggling wonder in your head of whether it's going to die on you in the middle of nowhere sometime soon.

Me, I would charge it with my charger, and use it.

Oh, by the way, there will likely be a lot of opinions on this. This is just mine. The same thing happened to me about 4 years ago. I'm still using that battery.

Rob

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post #3 of 14 Old 11-11-2010, 09:10 PM
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I agree with Rob. A dead battery needs to charge a lot longer. Most bike batteries I have had last 3-5 years, with minimal care. I would charge it fully and put it on a meter and watch it. As the days get shorter and darker you don't want to be stuck in the dark with a dead battery.

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post #4 of 14 Old 11-12-2010, 09:45 AM
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In a nutshell, motorcyle charging systems aren't as fast & efficient as an automobile's & most m'cycle charging systems do not generate sufficient charging ampereage until the engine reaches a few thousand rpm's. Although fully discharging a battery isn't good for it, it won't kill a good healthy battery. Just try not to do it too often & if/when you do, do yourself a favor & just park it for about 6-8 or more hours & put a good batt charger on it. If the battery is NON maintenance-free make sure you check the electrolyte (water/acid) levels in each cell. Just in case you don't know, ONLY add distilled water. Regular tap water has minerals & possible contanminents that can shorten battery life. I made the same bonehead mistake with my '06 Kawi Vulcan about 3 times just in the last year.
Here's another tip for prolonging the life of a m'cycle batt: buy a Battery Tender or an equivalent low amp trickle charger. Whenever you get home & park the bike plug it into the charger no matter how long you'd been riding. To keep this post from getting any more long & drawn out, I'll leave to you to do the research on the Why's & Wherefore's via the net. The Battery Tender website has some good info on the subject. Cheers! :mrgreen:

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post #5 of 14 Old 07-12-2011, 10:23 PM
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Me too

I left my key in/ignition on at work, fortunately the parking lot is well guarded. Jumped it to get it home, left the charger on it over night. Charger was blinking green in the morning but solid green by afternoon. Went to ride it the next day and it wouldn't start. Hoped there would be some advice here.

Previous ride: Orange Wee Club #34
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post #6 of 14 Old 07-13-2011, 10:23 AM
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Drawing a battery down below 50% (12.1 volts) shortens its life. Kind'a like a cat with nine lives, we don't know it your battery was on its first life (and will be good for a long time after a full charge) or on its eighth life and will soon require replacement.

Get a charger with automatic operation (so it turns itself off or nearly off when the battery is fully charged, and no more than 2 amps max output (0.75 to 1.33 range is good). Battery Tender Jr. and BatteryMINDer Plus are two good ones; there are others.

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post #7 of 14 Old 07-13-2011, 10:29 AM
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Cycle Gear has the Yuasa battery tender chargers on sale right now. I like them, they seem to outlast the "Battery Tender" brand for me. I just got 2 new ones

Cycle Gear - YUASA: Smart Shot 900 Battery Charger and Maintainer,

Quote:
From Yuasa, the finest name in power sports batteries! The Smart Shot, charger/maintainer, combines full charging capability with advanced maintenance function. Keeping your battery fully charged and ready to roll during these critical winter months. Show your battery some love with The Smart Shot.

Features and Benefits
Fully automatic three level charge cycle for effective charging
Reaches 14.4 volt peak, then automatically switches to float
Reverse polarity protection
Two year limited warranty

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post #8 of 14 Old 07-13-2011, 12:55 PM
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Drained my battery almost completely when less than a month old - same story of turning the ignition key one step too far. The bike barely started the next morning and I thought it was trashed, but it fully recovered on its own (no trickle charger) and lasted another 5 years.
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post #9 of 14 Old 07-13-2011, 01:04 PM
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Quote:
Originally Posted by happypuppy View Post
I agree with Rob. A dead battery needs to charge a lot longer. Most bike batteries I have had last 3-5 years, with minimal care. I would charge it fully and put it on a meter and watch it. As the days get shorter and darker you don't want to be stuck in the dark with a dead battery.
Hey! Don't remind us that the days are going to get shorter and darker!!!

It's been a crappy spring and short summer so far and I need all the light and warmth I can get, especially here in the Great White North...




So there.




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post #10 of 14 Old 07-13-2011, 05:23 PM
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That's the charger I have.

Quote:
Originally Posted by PTRider View Post
Get a charger with automatic operation (so it turns itself off or nearly off when the battery is fully charged, and no more than 2 amps max output (0.75 to 1.33 range is good). Battery Tender Jr. and BatteryMINDer Plus are two good ones; there are others.
I have the Battery Tender Jr (use it all winter), put it on charge again last night, was solid green this morning but weather called for rain again and I didn't want to risk it not starting. I guess I could have carried my new jumpers with me.

It only takes me a few days of commuting in my car to spend more on gas than a new battery (even YUSUA at the dealer) will cost.

Will stop by Walmart tonight to see what they have and see if it will start when I get home tonight.

Previous ride: Orange Wee Club #34
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