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Battery usage patterns

Maneesh Godbole
Saloon Keeper

Joined: Jul 26, 2007
Posts: 10828

Recently I noticed, my battery does not last more then 2-3 hours when not plugged in. When I got the Mac it was around 5 hours. Of course this is development usage, typically with Eclipse+Jetty+Browser+Airport+Adium+iTunes running.

I usually never shut down my Mac. Just close the lid. Also, it is plugged in round the clock except for maybe 5 hours daily. I googled around and got conflicting opinions on exactly how the charging patterns should be.
Any tips?
Also, it is Summer in India right now with temps going up to almost 35-38 C. Would it affect the charge?

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Bear Bibeault
Author and ninkuma

Joined: Jan 10, 2002
Posts: 63870

Apple recommend 'calibrating' the battery once a month or so by letting it run down completely before recharging. Other than that, I'm not sure how usage patterns or temperature affect battery life.

It always amazes me how bad battery technology is in general. If battery tech had kept up with CPU tech, for example, we'd likely have dime-sized batteries that last a lifetime.

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Maneesh Godbole
Saloon Keeper

Joined: Jul 26, 2007
Posts: 10828

Thanks Bear. Will try recalibration.
I came across which made me wonder about the temperature.
kurt hanni
Ranch Hand

Joined: Aug 11, 2007
Posts: 140

don't plug it 24/7,

fully charge it then drain(5%), repeat this cycle always, this will exercise all cells of the battery and prolong its life.

I agree. Here's the link:
subject: Battery usage patterns
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