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

[Christopher Sawtell]

On Mon, 11 Jul 2005 23:14, David Tansey wrote:
> how do you test this? i'd like to know what my x40's 8-cell holds.
This out of a R40 which is two years and 5 months old.
chris@imogen chris $ cat /proc/acpi/battery/BAT0/info
present:                 yes
design capacity:         57600 mWh
last full capacity:      37320 mWh
battery technology:      rechargeable
design voltage:          14400 mV
design capacity warning: 1866 mWh
design capacity low:     200 mWh
capacity granularity 1:  1 mWh
capacity granularity 2:  1 mWh
model number:            IBM-02K7054
serial number:             147
battery type:            LION
OEM info:                SANYO
chris@imogen chris $ cat /proc/acpi/battery/BAT0/state
present:                 yes
capacity state:          ok
charging state:          charged
present rate:            0 mW
remaining capacity:      37130 mWh
present voltage:         16649 mV

The KLaptop daemon says it is 99% charged.
I get about very approximately 2 - 2:30 hours on battery.
The bios is set for economy, and I have have the cpufreq_ondemand loaded.
ibm-acpi-0.11 is loaded and running.

> 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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