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Old Dec 18th, 2011, 12:12 PM   #1
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Problems using Macbook Pro without Battery

Hi,

I'm on my MacBook Pro, and I'm using 2-3 cycles per day, so I'm looking at how to reduce that. I know from PC use that keeping the plug in at the same time as the battery reduces its life - as an aside I'm wondering if anybody knows any documentation that says Macs don't do that - in any case I'm thinking above using my MBP plugged in without the battery, but it isn't working for me.

When I take out the battery and try and turn it on (power cord only), it won't power on. When I power it on with the battery, then take out the battery, with the power cord in, the screen won't come on, and the white light on the button to lift the monitor flashes.

I am using a Macbook Pro 4,1, on Leopard 10.5.8

I have tried resetting the SMC as instructed from this article (Intel-based Macs: Resetting the System Management Controller (SMC)), and it didn't solve the problem. I'm aware of the decrease in processing power without the battery, I'm willing to make that sacrifice to save the battery life.

What should I do to be able to use the computer without the battery?
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Old Dec 18th, 2011, 01:43 PM   #2
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are you using the proper 85w adapter?

running with the battery out sucks...you only use one core when you do that. youre hobbling your expensive computer.
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Old Dec 18th, 2011, 02:09 PM   #3
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Quote:
Originally Posted by broad View Post
are you using the proper 85w adapter?

running with the battery out sucks...you only use one core when you do that. youre hobbling your expensive computer.
Wow, thank you so much for your post.

I have a 60W adapter, A1184.. That definitely answers the problem.

My point was to test it and see how it was practically speed-wise for my usage.

I'll look into getting a proper cord.
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Old Dec 18th, 2011, 05:05 PM   #4
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Maybe, and only if your MBPro is 15" or larger.

If it's the 13" model, most of them came with the 60W power adapter.

But why not just leave the battery installed and check out Apple's recommended suggestions on proper battery care and maintenance???
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Old Dec 18th, 2011, 05:17 PM   #5
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Originally Posted by pm-r View Post
Maybe, and only if your MBPro is 15" or larger.

If it's the 13" model, most of them came with the 60W power adapter.
It's a pre-unibody MacBook Pro, which makes it a 15" or 17" model. This means it requires an 85W MagSafe to operate properly.

If it was a 13" MacBook Pro, then it would have only come with a 60W adapter. No 13" MacBook Pro has ever shipped with an 85W adapter.
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Old Dec 18th, 2011, 05:17 PM   #6
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From the horse's mouth:

MacBook and MacBook Pro: Mac reduces processor speed when battery is removed while operating from an A/C adaptor

Quote:
If the battery is removed from a MacBook or MacBook Pro, the computer will automatically reduce the processor speed. This prevents the computer from shutting down if it demands more power than the A/C adaptor alone can provide.
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Old Dec 18th, 2011, 05:57 PM   #7
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Quote:
Originally Posted by John Clay View Post
It's a pre-unibody MacBook Pro, which makes it a 15" or 17" model. This means it requires an 85W MagSafe to operate properly.

If it was a 13" MacBook Pro, then it would have only come with a 60W adapter. No 13" MacBook Pro has ever shipped with an 85W adapter.

Man, you're sure fast to pickup the specks from the info the OP supplied.

BTW: What does the 3,1, 4,1 and 5,1 model designation identification actually refer to??
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Old Dec 18th, 2011, 05:59 PM   #8
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Man, you're sure fast to pickup the specks from the info the OP supplied.

BTW: What does the 3,1, 4,1 and 5,1 model designation identification actually refer to??
It's a unique identifier assigned to each series of computer that has substantial component changes or design variations.
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Old Dec 18th, 2011, 07:04 PM   #9
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I know that it's an "identifier" and maybe the reason that it's referred to as a "Model Identifier"

I was curious as to what the actual differences might be, as for example, doing a search at the everymac site for "4,1" provides many different Mac models that all use the same Model Identifier. ie:

Lookup Mac Specs By Serial Number, Order, Model & EMC Number, Model ID @ EveryMac.com

Thanks, and it seems that everymac seems to have some additional info I'll check out.
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