If an OSX laptop is not connected to power, should not try to charge connected iOS devices

Originator:spector
Number:rdar://15379486 Date Originated:11/3/2013
Status:Duplicate of 12865521 Resolved:
Product:OSX Product Version:OS X 10.9 (13A598)
Classification:Power Reproducible:Always
 
Summary:
If you connect an iOS device to a Mac laptop, if the laptop itself is solely on battery power the USB connection is still used to charge the attached iOS device.  This is a serious battery killer in general, and especially for larger connected device like iPads.

Steps to Reproduce:
1. Unplug your laptop
2. Connect an iOS device
3. iOS device will start charging
4. Watch battery level fall.... 
5. Weep.

Expected Results:
There should be an option, especially with lightening/thunderbolt connections that the connection is used only for communications and not charging connected devices.  Having such an option would preserve the laptop's battery.

Actual Results:
the battery-only powered laptop winds up charging any/all connected iOS devices depleting the battery much faster.

Version:
OS X 10.9 (13A598)

Notes:


Configuration:
Obviously not a problem when the laptop is connected to mains power.

Attachments:

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