laptop battery cycling

[Dazed_75]

Interestingly, I have access to a number of laptops.  3 of those are Lenovo
G570 systems which came with Windows 7.  There have a charger mode that
turns of the charger at 80% (I think it is) and then turns it on when the
battery gets down to ~40%.

Unfortunately Ubuntu does not have such an option.  And my Lenovo x220 does
not seem to either, but it does shut off the charger when the battery
reaches 100% whether the machine is on or not.

As a general rule, I only plug in laptop chargers when needed or when I
will have it on for a long period of time or don't want the hassle of
constant screen dimming.

On Sun, May 6, 2012 at 6:35 PM, Michael Havens <bmike1 at gmail.com> wrote:

> I got the cheapest black friday sale laptop they had at walmart. It is a
> bitchin computer!!!
>
>
> On Sun, May 6, 2012 at 6:18 PM, keith smith <klsmith2020 at yahoo.com> wrote:
>
>>
>> I run 2 laptops all day - about 14 hours a day.  I pulled both
>> batteries.  They are in my desk drawer where they have been for 4+ months.
>>
>> Your saying it is better to just leave the battery in the laptop at 100%
>> than to remove it?
>>
>> I wonder what they life expectancy is?  What would be your guess?
>>
>> I never take the these two laptops off A/C.
>>
>> I when to laptops last year in the hope of less heat.   And I buy cheap
>> laptops.  Both were on sale.  Cheaper than a desktop.
>>
>> ------------------------
>> Keith Smith
>>
>> --- On *Sun, 5/6/12, Jim March <1.jim.march at gmail.com>* wrote:
>>
>>
>> From: Jim March <1.jim.march at gmail.com>
>> Subject: Re: laptop battery cycling
>> To: "Main PLUG discussion list" <plug-discuss at lists.plug.phoenix.az.us>
>> Date: Sunday, May 6, 2012, 4:34 PM
>>
>> My VERY limited understanding is, the problem isn't "overcharging"
>> exactly.  It's that Li-Ion batteries are weird.  They last longest when
>> charged between 50% and 80% - as opposed to 100%.  But bad news:
>> maintaining the battery at a level below 20% is just as bad as keeping it
>> at 100% if not worse, so...leaving it out really isn't a good solution
>> either.
>>
>> What we REALLY need is a switch or setting in the laptop that will cause
>> a 100% charge when you know you'll need more battery life soon, otherwise
>> the default charge level is maintained at around 75%.  But that would
>> confoose too many people...might be a good FOSS project for geeks though?
>>
>> Failing that, the best solution is to leave it in there.  Yes, the
>> battery will slowly degrade.  But, at least you have protection from a
>> sudden crash if you accidentally the power plug :(.  If you can afford it,
>> run two batteries - swapping once every week or two (or however long it
>> takes for it to naturally drain to about 50%), with the one about to go on
>> the shelf being deliberately drained to about 80% first.
>>
>> Jim
>>
>> On Sun, May 6, 2012 at 4:17 PM, Robert Holtzman <holtzm at cox.net<http://mc/compose?to=holtzm@cox.net>
>> > wrote:
>>
>> For the record, I'm running a Lenovo T420i with a 6 cell battery.
>>
>> In the past I've been told that it's bad practice to run a laptop on AC
>> with the battery installed because it would cause reduced battery
>> capacity. This raises two questions. First, is it true that laptop
>> batteries don't have overcharge protection, and second, how many cycles
>> is a battery like mine good for?
>>
>> --
>> Bob Holtzman
>> If you think you're getting free lunch,
>> check the price of the beer.
>> Key ID: 8D549279
>>
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>
>
> --
> :-)~MIKE~(-:
>
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-- 
Dazed_75 a.k.a. Larry

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