GTA02 Battery Capacity (Was: Re: More about the GTA02)

[Kyle Bassett]

Is this smart battery (internal circuitry+cell) custom via OM, or third
party?


On Thu, Feb 14, 2008 at 11:58 AM, Wolfgang Spraul <wolfgang at openmoko.com>
wrote:

> Andy -
>
> > class to expose it so it is generic.  (I don't know for sure if it
> > will
> > ship with such a battery since it is decided in .tw according to
> > availability and so on, but I hope it will.)
>
> Yes, I think we can confirm that every GTA02 will ship with this new
> 'smart' battery.
> There are more steps to go through internally, related to
> certification, some sort of calibration. Tony, do you know more details?
> The cell's capacity will increase slightly to 1250 mAh (before was
> 1200 mAh).
> I am trying to release the schematics for the small PCB inside the
> smart battery as well, will be posted to the wiki.
>
> Wolfgang
>
> On Feb 15, 2008, at 12:43 AM, Andy Green wrote:
>
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > Somebody in the thread at some point said:
> >> On Thursday, Feb 14, 2008, "Kyle Bassett" writes:
> >>> There is talk about pushing startup power control of the internal
> >>> devices
> >>> (wifi, bt, gps, mmc, etc.) to user level, as every user may or may
> >>> not want
> >>> certain devices available at bootup/all the time (availability vs.
> >>> duration).
> >>
> >> Indeed, this along with good realtime stats on power usage and
> >> current
> >> battery level would let people have reasonably accurate predictions
> >> of
> >> their battery life.  It'd be interesting (to me at least) to turn
> >> on and off the various peripherals and watch my projected battery
> >> life
> >> go up and down accordingly.
> >
> > GTA02 is capable to dialogue with a "smart battery" that will allow
> > you
> > to see the battery actual voltage and current flow (together: actual
> > power) in uA down /sys in realtime, it uses the linux "Power Supply"
> > class to expose it so it is generic.  (I don't know for sure if it
> > will
> > ship with such a battery since it is decided in .tw according to
> > availability and so on, but I hope it will.)
> >
> > The battery itself learns its cell performance over load and also
> > makes
> > available its "time to full/empty" estimate down /sys as well in
> > seconds.  You can see what data is available here:
> >
> > http://www.ti.com/lit/gpn/bq27000
> >
> > You can see stuff like this
> >
> > for i in capacity charge_full current_now present status technology
> > temp
> > time_to_empty_now time_to_full_now type voltage_now ; do echo -n "$i
> > " ; cat /sys/devices/platform/bq27000-battery.0/power_supply/bat/
> > $i ; done
> >
> > capacity    0
> > charge_full    1215585
> > current_now    183375
> > present    1
> > status    Discharging
> > technology    Li-ion
> > temp    276
> > time_to_empty_now    0
> > time_to_full_now    3932100
> > type    Battery
> > voltage_now    2761000
> >
> > - -Andy
> > -----BEGIN PGP SIGNATURE-----
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> > Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org
> >
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> > 9ebCrbNjtGtDMBsJuUXZ8HY=
> > =ANtG
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> >
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