Do These Things Work? - Kawasaki KLR 650 Forum
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post #1 of 4 Old 01-20-2012, 12:35 AM Thread Starter
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Do These Things Work?

I keep seeing these things in some catalogs my wife gets and I just can't comprehend how they could possibly work for a car battery. It just doesn't seem possible to me.

But what about a motorcycle battery? Anybody ever seen or used one of these things? Seems like they're small enough (3"x2.5" isn't very big) to be easily carried and they claim to be rechargeable. Wonder if they would provide enough juice to a run-down motorcycle battery to give you a chance to spin the starter over at least for a couple of seconds?

For now, I remain a skeptic, even for boosting a motorcycle battery.

http://www.harrietcarter.com/index.c...6-6722D16F0134

Here's another version. I note that it is advertised for use on "weak" batteries.

http://www.vat19.com/dvds/auto-jumpe...out-cables.cfm



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post #2 of 4 Old 01-20-2012, 06:33 AM
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Quote:
Originally Posted by planalp View Post
I keep seeing these things in some catalogs my wife gets and I just can't comprehend how they could possibly work for a car battery. It just doesn't seem possible to me.

But what about a motorcycle battery? Anybody ever seen or used one of these things? Seems like they're small enough (3"x2.5" isn't very big) to be easily carried and they claim to be rechargeable. Wonder if they would provide enough juice to a run-down motorcycle battery to give you a chance to spin the starter over at least for a couple of seconds?

For now, I remain a skeptic, even for boosting a motorcycle battery.

http://www.harrietcarter.com/index.c...6-6722D16F0134

Here's another version. I note that it is advertised for use on "weak" batteries.

http://www.vat19.com/dvds/auto-jumpe...out-cables.cfm
I cant say whether they work or not but my guess would be that they probably sorta work, not great but ok. I imagine you would have to sit there and wait for 30 minutes though. Something to remember about these things, they arent designed to be used on a dead or nearly dead battery, just one that is low. In my book, that makes them almost useless.
Whats wrong with the tried and true push start technique? Thats the advantage to a motorcycle, you can push start yourself.

Last edited by ray h; 01-20-2012 at 06:39 AM.
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post #3 of 4 Old 01-20-2012, 07:05 AM
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Actually they do work. Require time to discharge so it's not plug in and start the vehicle. If the battery is toast it won't help. since the transfered power is just lost to chemical conversion.

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post #4 of 4 Old 01-20-2012, 09:05 AM
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I bought a cheap solar powered battery charger from HF. Works great. Even has an SAE plug so I can plug it in my MC's if I want. In this cold weather I just plug it in my SUV during the day when I'm at work. In my Tracker I have an aftermarket stereo hooked up and power comes directly off the battery. If I plug it in on a sunny day the stereo will immediately come on. Cloudy day it won't. Pretty cool.
I've thought about trying to find a female cig lighter so I can plug cell phone cords into it and charge them up, light during a power outage. Kind of geeky, but cool.

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