Lithium battery life.


by Johnny_B
Tags: battery, life, lithium
Johnny_B
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#1
Jan30-14, 11:30 PM
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I got a lithium battery pack for my ski glove. On high it last for 2 hour, 4 hours for medium but on low it only last 3 hours. Why does the battery not working long on high? Does the cold weather affect the batteries from operating at its peaks power. Would it be better if I use some type of extra insulation around the battery pack so the battery would be cold.


thanks for the help.
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davenn
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#2
Jan31-14, 05:45 AM
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hi johnny
welcome to the forums

the battery doesnt last as long on high because more current is being drawn from it, that reduces its operating time before a recharge

not sure why it would operate for less time on low than on medium, unless it's already been used for a while on one of the other power settings ??

cheers
Dave
NascentOxygen
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#3
Jan31-14, 07:47 AM
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Quote Quote by Johnny_B View Post
I got a lithium battery pack for my ski glove. On high it last for 2 hour, 4 hours for medium but on low it only last 3 hours. Why does the battery not working long on high? Does the cold weather affect the batteries from operating at its peaks power. Would it be better if I use some type of extra insulation around the battery pack so the battery would be cold.
Hi Johnny_B! First, have you confirmed that the setting marked "LOW" is actually the lowest heat setting; maybe it is wrongly wired and is really the MEDIUM heat setting?

Johnny_B
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#4
Jan31-14, 08:58 AM
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Lithium battery life.


What I meant to ask is why is the batteries not lasting longer on low setting.

I will do a test on each setting today and post up some result so that ya can see.


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NascentOxygen
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Jan31-14, 04:20 PM
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Quote Quote by Johnny_B View Post
What I meant to ask is why is the batteries not lasting longer on low setting.
Coincidently, that is the very conundrum I was addressing.

I will do a test on each setting today and post up some result so that ya can see.
Good idea!
mfb
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#6
Jan31-14, 04:39 PM
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If the batteries are very cold (with "low" setting?), they can discharge quicker. On the other hand, this discharging should make them warmer, stopping the effect...
NascentOxygen
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Jan31-14, 05:50 PM
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Quote Quote by mfb View Post
If the batteries are very cold (with "low" setting?), they can discharge quicker. On the other hand, this discharging should make them warmer, stopping the effect...
Are you talking about self-discharge? This over a period of months?
mfb
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#8
Feb1-14, 02:02 PM
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Self-discharge is not an issue within hours, but I think the internal resistance depends on the temperature, too.


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