Well there are some very advanced features available for android.

There is the battery graph, which shows you what is running, and your battery 
charge during the day.
The same one I think has the ability to measure the battery usage of each 
process. (How this is done I am not sure.. it could just be measuring 
application CPU time over an interval and taking the differnence in charge.) So 
you can tell what apps suck it down.
Then it allows you to combine all that and at X% shut down some apps to slow 
battery usage. And more apps at Y%.

But this is all application level. 

An improvement would be an overall "call time remaining" or "application time 
remaining" because may people use more time in apps more than minutes on the 
phone. 


Someone proposed all kinds of rules.. and it really needs to be up to the user.






----- Original Message ----
From: "Apparao, Padmashree K" <[email protected]>
To: Arjan van de Ven <[email protected]>; Rémi Denis-Courmont 
<[email protected]>
Cc: "[email protected]" <[email protected]>
Sent: Thu, February 10, 2011 5:49:09 PM
Subject: Re: [MeeGo-dev] BME (Battery Management Entity) on MeeGo

Typically there should a fuel gauging application that reads the information 
from the device kit power using dbus info and can inform the user of the 
battery 
conditions

-- provide low battery warning to user, so the users can shutdown unnecessary 
apps
-- provide warning to user indicating when "calls will no longer be possible" 
given the current rate of discharge

The policy manager can also figure out how best to 
--make emergency calls when the battery is really low (these will depend on 
battery type, voltage left and modem power etc)

Eventually the user space policy manger can define these scenarios

-Padma



-----Original Message-----
From: [email protected] [mailto:[email protected]] On 
Behalf 
Of Arjan van de Ven
Sent: Wednesday, February 09, 2011 9:35 AM
To: Rémi Denis-Courmont
Cc: [email protected]
Subject: Re: [MeeGo-dev] BME (Battery Management Entity) on MeeGo

On 2/9/2011 3:30 AM, Rémi Denis-Courmont wrote:
> On Saturday 29 January 2011 10:42:28 ext Carsten Munk, you wrote:
>> 2011/1/29 Lego Ming<[email protected]>:
>>> Hi all,
>>> We want to study the Battery Management Mechanism on MeeGo Handset.
>> The battery management mechanism on MeeGo handset is up to the
>> individual hardware adaptation. You're likely to have to implement
>> that yourself depending on your hardware.
> Shouldn't the values be readable with the standard power_supply device class
> in Linux sysfs at least?

absolutely

and the layer on top of that is upower which provides a dbus interface 
to this information.

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