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Old 10-24-06, 12:35 PM   #1
tibikefor2
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How does cold affect Lithium Ion Batteries

All:

I have heard that cold (32f & below) can affect the run time of lithium ion based batteries.

Does anyone have any studies or white papers on this subject?

Thanks.
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Old 10-24-06, 01:23 PM   #2
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Specific answers really depend upon the particular battery.

http://www.toshiba.co.jp/about/press/2005_03/pr2901.htm

http://www.cap-xx.com/resources/app_briefs/ab1004.pdf

http://www.urbanfox.tv/articles/batt...batteries.html


This is the really good stuff.

OK

http://data.energizer.com/PDFs/E92.pdf

http://data.energizer.com/PDFs/l91.pdf
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Old 10-24-06, 01:37 PM   #3
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I am thinking of replacing my Light & Motion NimH with a Lithium-Ion battery for longer run times. I head that Lithium-Ion batteries do not like the cold.
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Old 10-24-06, 02:22 PM   #4
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Read my post. LiIon do much better than NiMH in the cold.
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Old 10-24-06, 03:03 PM   #5
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My L&M Li-ion has run down to -20*f with no problems.
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Old 10-24-06, 06:51 PM   #6
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My L&M Li-ion has run down to -20*f with no problems.
I don't think my house has ever been down to -20f !! There would be some problems.
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Old 10-24-06, 08:05 PM   #7
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Yeah, it's a bummer. When I bought my HID parts, the stuff I had read indicated the LiIon was useless in the cold, and NiMH worked better, so I went with NiMH though I'd have preferred LiIon due to lower weight. I'm not a weight weenie but if 2 things are the same cost and the one that's 2 pounds lighter works better, it's a no-brainer.
Ah well, I'm stuck with it for a few years until the battery craps out.

But FWIW, My NiMH has performed totally fine down to -5*F which is as cold as I've seen since I got it. I do charge it more when it's cold, and I bring it inside, and I don't really keep track of runtime; I have nominal 3.5 hours, but my commute is 45 minutes, I only usually use the light on the way in, and I charge "when I think of it" which is usually every 3 to 4 days, so I'm pushing it sometimes. When it's really cold I try to remember to charge every other day. Besides on those days sometimes I'm running the rear strobe in the afternoon, which draws a lot less but it does take the battery down a bit.
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Old 10-24-06, 08:13 PM   #8
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I don't think my house has ever been down to -20f !! There would be some problems.
I actually use it on a bicycle outdoors.
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Old 10-24-06, 08:28 PM   #9
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I actually use it on a bicycle outdoors.
I get it.

I have experienced -30 in another place. The lead acid battery in my car was not working very well. But it worked just good enough. I should have used a 110v battery warmer.
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Old 10-25-06, 07:33 AM   #10
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Thanks for the feedback and advice
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