[ltp] poll: how is your battery? (9-cell-battery lost about 25% capacity in 10 months)

[Kelvin KAN]

Sorry,  this is a novice in Linux power management.

Would some other experts answer David pls?


David Tansey wrote:

>that'd be nice if i had windows... any way to do it in linux? 
>
>-david
>
>On 7/11/05, Kelvin KAN <kelvin@sgi.com> wrote:
>
>>We don't "test" the battery capacities.  They are reported by (Windows)
>>Thinkpad Config - Battery Maximizer Wizard.
>>
>>
>>David Tansey wrote:
>>
>>
>>>how do you test this? i'd like to know what my x40's 8-cell holds.
>>>
>>>On 7/11/05, Kelvin KAN <kelvin@sgi.com> wrote:
>>>
>>>
>>>>My T42, bought 2005/1, now 30 charging cycles:
>>>>
>>>>design capacity:         47520 mWh
>>>>last full capacity:      45000 mWh
>>>>
>>>>i.e. loss of more than 5% in 7 months, even when I have been always
>>>>taking out the battery in office/home environments.
>>>>
>>>>Yes, compared with my previous TP600E, I think T42 is much worse.
>>>>
>>>>
>>>>-
>>>>kelvin.
>>>>
>>>>
>>>>honey@gneek.com wrote:
>>>>
>>>>
>>>>
>>>>>On Mon, 11 Jul 2005, Fionn Behrens wrote:
>>>>>
>>>>>
>>>>>
>>>>>>What would you say, is a loss of 25%-30% in 10 months really acceptable
>>>>>>for a quality battery? What are your own experiences?
>>>>>>
>>>>>>
>>>>>I'd tend to agree - my IBM battery experience is certainly worse than
>>>>>my Dell experience (just about everything else has been better).  My
>>>>>6-cell T40 battery is I guess about 15 months old:
>>>>>
>>>>>design capacity:         47520 mWh
>>>>>last full capacity:      18450 mWh
>>>>>
>>>>>Lasts about 30 minutes or less now.  I don't see that there's much
>>>>>you can do except write off IBM as using a poor-quality battery
>>>>>supplier?  And cost replacements into the running cost of IBM laptops.
>>>>>I incidentally never bother taking my battery out - the heat from my
>>>>>CPU/motherboard never seems to reach the battery when I feel for it,
>>>>>and it always feels quite cool.  Taking it out would seem to me to
>>>>>really unbalance the laptop.
>>>>>
>>>>>Must test my 9-cell battery soon.
>>>>>
>>>>>Honey
>>>>>
>>>>>
>>>>--
>>>>The linux-thinkpad mailing list home page is at:
>>>>http://mailman.linux-thinkpad.org/mailman/listinfo/linux-thinkpad
>>>>
>>>>
>>>>
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>>