Calibrating the battery on an Apple MacBook / MacBook Pro

In this video I’ll show you how to use a somewhat obscure tool from the command line in Mac OS X to help drain your battery faster when it comes time to calibrate the battery on your Apple laptop. More info about dev null can be found at: en.wikipedia.org

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This entry was posted by Admin on November 16, 2010 at 10:48 am, and is filed under Laptop Battery Videos. Follow any responses to this post through RSS 2.0. You can leave a response or trackback from your own site.

25 comments

Athos523 (919 days)

@bassplayer247 if you were exporting a 14 min 720p video it’ll train it pretty fast.

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Athos523 (919 days)

@AryanAcepilot36 it’s projected to last 10 hours. that’s if you have the brightness set as dark as you can go with the backlit keyboard lights turned off, with other functions turned off.

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Athos523 (919 days)

@FrosChannel or export a 720p 14 min video will also do the trick.

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FrosChannel (919 days)

Now you can just run down the battery by playing Counter Strike or Team Fortress 2.

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ElizaDay66 (919 days)

Question. I didn’t drain it in one sitting. I started last night, it got late, I went to sleep. There’s a little juice left in my battery this morning. I wanted to resume the process. Is this okay or do I have to drain in one sitting?

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CelticsFanBoy92 (918 days)

What is the airport thing for the internet about that you said turn on in the beginning? I know it helps kill your battery but what is it for?

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AryanAcepilot36 (918 days)

after u did this did youre battery last up to 10 hours? i just got a macbook pro the 13 inch one and the battery is suppose to last 10 hours but mine only lasts for like 6 hours. i havent tried doing this. its been 2 days.

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supergrishy (918 days)

Check out the app Watts at binarytricks [dot] com

It’s very useful to do & schedule battery calibrations on any MacBook

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stephendew (918 days)

As other commenters have mentioned, these tips are a load of poo poo. If you deliberately speed up the process by using as much battery life as you can, then this process is pointless and only serves to add additional usage/wear to the battery.

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BackSpaceTheGreat (918 days)

I thought the new batteries didn’t need to be calibrated? And isn’t it harmful to fully discharge lithium ion batteries?

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CasperBHansen (918 days)

lol, do not follow these instructions … It won’t just discharge the battery, it’ll kill the computer if you do this every time you calibrate the battery …

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bassplayer247 (918 days)

would doing that command make a difference in performance if i were recording on my mac?

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jespir007 (918 days)

you could always watch a bunch of dvds or videos to shorten the time

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taylor22222222 (918 days)

Mine wont even discharge all the way even after two days!

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G30360 (918 days)

what if your macbook wont sleep for 5 hours after fully discharging? mine eventually powers down before 5 hours is up.

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Xalmr (918 days)

I believe he means by “kill” your battery is that it will just make it run out quickly to hasten the process.

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Douranium (918 days)

i don’t get it you said that it would kill the battery it really doesn’t damage it right?

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vetteboy453 (918 days)

what if i had mine for a month and haven’t done it is it still worth doing?

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shaneacc (918 days)

well yeah and it might kill your fans depending on how old they are

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macsandvaios (918 days)

i was trying but when i charged it i turned it on

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mikesdav (918 days)

you usually do this with these type of batteries they have some type of circuit in them and they control the battery a new type of battery should come soon they are late on making breaking edge technology again

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TheCityLightz (918 days)

it makes the battery read on your desktop more accurate and i guess its good for ur battery and extends its life as well

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wifi802n (918 days)

IDK battery maintenence

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651lkmsp (918 days)

why do u need 2 do this?

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cardshark87 (918 days)

lmao ya i have the 17” and it’ll take me 7.5 to 8

:S

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