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

[Kelvin KAN]

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
>>>
>>--
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>>