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Extend battery life by turning off AirPort System
This is one of those hints that may seem exceptionally obvious to people, but may not have occurred to others: if you wish to conserve battery life on your laptop and don't require network access, turn off your AirPort card (which can be easily done via the menu extra).

[robg adds: Yes, it's obvious. It's also easily overlooked; I switched mine off this weekend while writing some stuff, and probably gained 20 to 30 minutes of useful battery time...]
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Extend battery life by turning off AirPort | 5 comments | Create New Account
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Extend battery life by turning off AirPort
Authored by: Severian on Mar 03, '03 11:29:50AM

It's not just AirPort that can drain your battery. All of the networking interfaces will draw power when they are active. So if you are using only AirPort, you should turn off the internal modem, ethernet, and Bluetooth.

To conserve energy, I use the Location Manager. In Network Perferences, I created a Location called ZeroAccess (so it sits at the bottom of the alphabetized list) that has all of the Network Ports deactivated. When I'm not using the network, I change my location to ZeroAccess and all that power-hungry network hardware is turned off.



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Extend battery life by turning off AirPort
Authored by: merlyn on Mar 03, '03 12:40:33PM
I called my location with everything disabled: Working Without A Net. {grin}

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Extend battery life by turning off AirPort
Authored by: deleted_user18 on Mar 03, '03 02:43:53PM

Why does it consume energy to have modem and ethernet enabled even if nothing is connected?



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Extend battery life by turning off AirPort
Authored by: isaacfinnegan on Mar 03, '03 03:45:03PM

This doesn't actually work. I've spoken with support techs, and the airport card never actually gets turned off. The menu extra does disable the network interface, but the hardware is not ever powered off unless you remove it. I suppose this is part of the kernel extension and why the Airport Extreme hacks to work with other cards have problems when you remove the 802.11g cards.



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Re: Extend battery life by turning off AirPort
Authored by: Anonymous on Mar 04, '03 03:42:47PM

I'm sorry; I must disagree with your belief. As the submitter of the hint, within a few seconds of when I turn AirPort off, my Battery menu extra revises its estimate of remaining time and produces a larger figure.



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