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RE: no longer possible to detect battery presence? RE: Battery API in Last Call

From: Carr, Wayne <wayne.carr@intel.com>
Date: Fri, 2 Dec 2011 00:10:21 +0000
To: "olli@pettay.fi" <olli@pettay.fi>
CC: Dominique Hazael-Massieux <dom@w3.org>, "public-device-apis@w3.org" <public-device-apis@w3.org>, "public-device-status@w3.org" <public-device-status@w3.org>
Message-ID: <52F8A45B68FD784E8E4FEE4DA9C6E52A2403914D@ORSMSX102.amr.corp.intel.com>
You can tell now whether there is a battery or not except when the battery is full.  So there is just a window when you don't know - when apps are told they are charging when they actually are discharging.  So I don't think it has anything to do with privacy. 

If you have a full battery and disconnect your power source,  the spec says to report that the battery is charging --  even though it really is discharging. 

>-----Original Message-----
>From: Olli Pettay [mailto:Olli.Pettay@helsinki.fi]
>Sent: Thursday, December 01, 2011 3:06 PM
>To: Carr, Wayne
>Cc: Dominique Hazael-Massieux; public-device-apis@w3.org; public-device-
>Subject: Re: no longer possible to detect battery presence? RE: Battery API in Last
>On 12/02/2011 12:59 AM, Carr, Wayne wrote:
>> It appears that changes in the Last Call draft have made it so there
>> is no way to distinguish between a full battery and no battery being
>> present.  Was the ability to detect a battery being present
>> intentionally removed?
>I hope so.
>Being able to detect whether or not there is a battery would be a privacy
>violation and would allow some fingerprinting.
>>> -----Original Message----- From: Dominique Hazael-Massieux
>>> [mailto:dom@w3.org] Sent: Tuesday, November 29, 2011 8:25 AM To:
>>> public-device-apis@w3.org Cc: public-device-status@w3.org Subject:
>>> Battery API in Last Call
>>> Hi,
>>> The Battery Status API was published today as a Last Call Working
>>> Draft: http://www.w3.org/TR/2011/WD-battery-status-20111129/

>>> Please send comments regarding this document to
>>> public-device-apis@w3.org ; the last call period ends on December
>>> 20 2011.
>>> Dom

Received on Friday, 2 December 2011 00:10:54 UTC

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