Jump start dead battery ?
#11
02-13-2008 | 11:14 PM
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RE: Jump start dead battery ?
if the cage is not running, nothing should fry.
they are both 12v batteries, so i dont know where any excess voltage would come from. unless the cage was running.
as for the amperage, IIRC, it will only draw the amps that they need. the bike draws N amps when you push the button. its only going to get N amps from the battery.
they are both 12v batteries, so i dont know where any excess voltage would come from. unless the cage was running.
as for the amperage, IIRC, it will only draw the amps that they need. the bike draws N amps when you push the button. its only going to get N amps from the battery.
#12
02-14-2008 | 06:21 PM
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From: La Costa, CA
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RE: Jump start dead battery ?
I wish I had your confidence. I don't trust electricity well enough to use a car battery this way.
I prefer to leave that black-magic alone and stick with the mfr's recommended methods.
(The weird thing is I spend most of my workday on the phone with electrical engineers and microelectronics production managers.)
Peace!
-CCinC
I prefer to leave that black-magic alone and stick with the mfr's recommended methods.
(The weird thing is I spend most of my workday on the phone with electrical engineers and microelectronics production managers.)
Peace!
-CCinC
#13
02-15-2008 | 12:31 AM
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RE: Jump start dead battery ?
oooo i can chime in here ....a few months back i was havin problems w/ my bike dyin and havin troubles starting....turns out it was a "trap" in my fuel line....anyways i jumped my bike off a car due to the fact i was runnin my battery dead tryin to diagnose the problem....well after doin this i found my problem..or so i thought...turns out my little black box was fried. after i replaced the box my problem was still there ..... if i knew now what i didnt know then...........
#14
02-15-2008 | 01:58 AM
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From: Clarksville, OH
RE: Jump start dead battery ?
Dragknee and Calamari, you're both right, at least in my experience. I've used a car battery to jump my bike at least a few times in the past, with positive (pardon the pun) results. However, it's a technique that can be potentially hazardous to your electrical system, as you point out. I think the best rule of thumb is to not prolong the jump process in the absence of a load (i.e. starter)if greatly exceeding the acceptable system amperage; not using a 200amp battery charger blast for an hour. When your battery is in a low charge state, you can (and must) add amps to it to bring it back to it's charged state. That's what an alternator does! The problem is when you blast it with so much amperage that you begin to cook stuff.
The bike will get 12 VOLTS from the car battery whether it's running or not, but it willget whatever AMPS the alternator is generating, if the car is running.(Think of it as switching your car alternator with your bike alternator. I don't think they are rated the same in amps.) Little batteries don't like big alternators.
The bike will get 12 VOLTS from the car battery whether it's running or not, but it willget whatever AMPS the alternator is generating, if the car is running.(Think of it as switching your car alternator with your bike alternator. I don't think they are rated the same in amps.) Little batteries don't like big alternators.
#15
02-18-2008 | 10:13 PM
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RE: Jump start dead battery ?
ORIGINAL: jeffzx9
Dragknee and Calamari, you're both right, at least in my experience. I've used a car battery to jump my bike at least a few times in the past, with positive (pardon the pun) results. However, it's a technique that can be potentially hazardous to your electrical system, as you point out. I think the best rule of thumb is to not prolong the jump process in the absence of a load (i.e. starter)if greatly exceeding the acceptable system amperage; not using a 200amp battery charger blast for an hour. When your battery is in a low charge state, you can (and must) add amps to it to bring it back to it's charged state. That's what an alternator does! The problem is when you blast it with so much amperage that you begin to cook stuff.
The bike will get 12 VOLTS from the car battery whether it's running or not, but it willget whatever AMPS the alternator is generating, if the car is running.(Think of it as switching your car alternator with your bike alternator. I don't think they are rated the same in amps.) Little batteries don't like big alternators.
Dragknee and Calamari, you're both right, at least in my experience. I've used a car battery to jump my bike at least a few times in the past, with positive (pardon the pun) results. However, it's a technique that can be potentially hazardous to your electrical system, as you point out. I think the best rule of thumb is to not prolong the jump process in the absence of a load (i.e. starter)if greatly exceeding the acceptable system amperage; not using a 200amp battery charger blast for an hour. When your battery is in a low charge state, you can (and must) add amps to it to bring it back to it's charged state. That's what an alternator does! The problem is when you blast it with so much amperage that you begin to cook stuff.
The bike will get 12 VOLTS from the car battery whether it's running or not, but it willget whatever AMPS the alternator is generating, if the car is running.(Think of it as switching your car alternator with your bike alternator. I don't think they are rated the same in amps.) Little batteries don't like big alternators.
It is a better idea to jump your bike with the donor car off though. Effectively knocking off about 2V on where the battery does not try to reach. You should be able to start it immediately after, even if its completely dead. But on most bikes, you will want to drive it around for at least 15 minutes at at least 4k rpms.
But like CC said, by far, the best way, is a trickle charger with an automatic turn off. If youre just winterizing your bike, a solar panel could do you some good if applicable.
Also, most trickle chargers have a quick disconnect plug so you can leave it on your battery at all times, and use it as needed (i.e. every winter)
-Cody
#16
02-19-2008 | 06:39 PM
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RE: Jump start dead battery ?
Hey guys,
So after doing quite a bit of research, I went ahead and jumpstarted the bike from my car battery (while the car was off). Worked fine, started right up. Only problem is I rode it around for about a half hour and after parking for a few hrs (maybe 4 or so) it wouldn't start up again, so it's looking like it won't hold a charge. Guess this means I'm going to have pick up a new battery?
I'll call the shop later today to see how much they are, hopefully not too much. Pick up a battery tender while I'm at it. Are there battery tenders that work well outside- I don't have a garage for my bike to sit in.
So after doing quite a bit of research, I went ahead and jumpstarted the bike from my car battery (while the car was off). Worked fine, started right up. Only problem is I rode it around for about a half hour and after parking for a few hrs (maybe 4 or so) it wouldn't start up again, so it's looking like it won't hold a charge. Guess this means I'm going to have pick up a new battery?
I'll call the shop later today to see how much they are, hopefully not too much. Pick up a battery tender while I'm at it. Are there battery tenders that work well outside- I don't have a garage for my bike to sit in.
#17
02-19-2008 | 06:42 PM
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From: Coastal NC
RE: Jump start dead battery ?
battery tender will work fine outside as long as it doesn't get soaked - if its raining you can just stick it in a plastic bag and close the opening - or cover it with an upside down bowl or something.
#18
02-19-2008 | 08:47 PM
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From: La Costa, CA
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RE: Jump start dead battery ?
Before replacing your battery, take it for a long ride to give it a chance to charge (or get the Battery Tender Jr.)
You want to ride it at freeway speed for at least a half hour to give the battery a chance to charge back up. Longer than that would be better, and a Battery Tender would be best of all.
-CCinC
You want to ride it at freeway speed for at least a half hour to give the battery a chance to charge back up. Longer than that would be better, and a Battery Tender would be best of all.
-CCinC
#19
02-20-2008 | 10:26 PM
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RE: Jump start dead battery ?
You can get one at any Oreilleys or other part stores. If you do keep your bike outside, I'd recommend a solar panel. Theyre not going to charge it in one day, but if youre just using it to 'winterize' it, then its great because its cheap, waterproof, and doesnt require an outlet!
-Cody
-Cody
#20
02-21-2008 | 10:55 PM
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RE: Jump start dead battery ?
you can take it to oreilly's / autozone to get them to test the battery and / or the alternator(stator). IF they are able to test our alternators(stators)? IDK
I read that it will shorten the batt life if you charge a batt with a rate above 1amp. Not sure if this is in all cases?
I read that it will shorten the batt life if you charge a batt with a rate above 1amp. Not sure if this is in all cases?
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