Is this smart battery (internal circuitry+cell) custom via OM, or third party?<br><br><br><div class="gmail_quote">On Thu, Feb 14, 2008 at 11:58 AM, Wolfgang Spraul <<a href="mailto:wolfgang@openmoko.com">wolfgang@openmoko.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Andy -<br>
<div class="Ih2E3d"><br>
> class to expose it so it is generic. (I don't know for sure if it<br>
> will<br>
> ship with such a battery since it is decided in .tw according to<br>
> availability and so on, but I hope it will.)<br>
<br>
</div>Yes, I think we can confirm that every GTA02 will ship with this new<br>
'smart' battery.<br>
There are more steps to go through internally, related to<br>
certification, some sort of calibration. Tony, do you know more details?<br>
The cell's capacity will increase slightly to 1250 mAh (before was<br>
1200 mAh).<br>
I am trying to release the schematics for the small PCB inside the<br>
smart battery as well, will be posted to the wiki.<br>
<font color="#888888"><br>
Wolfgang<br>
</font><div><div></div><div class="Wj3C7c"><br>
On Feb 15, 2008, at 12:43 AM, Andy Green wrote:<br>
<br>
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><br>
> Somebody in the thread at some point said:<br>
>> On Thursday, Feb 14, 2008, "Kyle Bassett" writes:<br>
>>> There is talk about pushing startup power control of the internal<br>
>>> devices<br>
>>> (wifi, bt, gps, mmc, etc.) to user level, as every user may or may<br>
>>> not want<br>
>>> certain devices available at bootup/all the time (availability vs.<br>
>>> duration).<br>
>><br>
>> Indeed, this along with good realtime stats on power usage and<br>
>> current<br>
>> battery level would let people have reasonably accurate predictions<br>
>> of<br>
>> their battery life. It'd be interesting (to me at least) to turn<br>
>> on and off the various peripherals and watch my projected battery<br>
>> life<br>
>> go up and down accordingly.<br>
><br>
> GTA02 is capable to dialogue with a "smart battery" that will allow<br>
> you<br>
> to see the battery actual voltage and current flow (together: actual<br>
> power) in uA down /sys in realtime, it uses the linux "Power Supply"<br>
> class to expose it so it is generic. (I don't know for sure if it<br>
> will<br>
> ship with such a battery since it is decided in .tw according to<br>
> availability and so on, but I hope it will.)<br>
><br>
> The battery itself learns its cell performance over load and also<br>
> makes<br>
> available its "time to full/empty" estimate down /sys as well in<br>
> seconds. You can see what data is available here:<br>
><br>
> <a href="http://www.ti.com/lit/gpn/bq27000" target="_blank">http://www.ti.com/lit/gpn/bq27000</a><br>
><br>
> You can see stuff like this<br>
><br>
> for i in capacity charge_full current_now present status technology<br>
> temp<br>
> time_to_empty_now time_to_full_now type voltage_now ; do echo -n "$i<br>
> " ; cat /sys/devices/platform/bq27000-battery.0/power_supply/bat/<br>
> $i ; done<br>
><br>
> capacity 0<br>
> charge_full 1215585<br>
> current_now 183375<br>
> present 1<br>
> status Discharging<br>
> technology Li-ion<br>
> temp 276<br>
> time_to_empty_now 0<br>
> time_to_full_now 3932100<br>
> type Battery<br>
> voltage_now 2761000<br>
><br>
> - -Andy<br>
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</div></div></blockquote></div><br>