Running without the battery. Bad for the Macbook?

I want to preserve the integrity of my battery, so I am runing my MBP without it in. I just have it plugged into the wall. I'm wondering, is it bad to run it without the battery? Like, are there any huge malfunctions that could happen?
I dont want to constantly run it with the battery, when I have a wall outlet. My brother did that with his powerbook, and ater a year, his battery life sucked.

All batteries lose their ability to recharge to its full factory capacity, Li-ion or not. This is the very nature of rechargeable batteries. Since li-ions don't have a memory footprint, it doesn't matter what you store them at.
You bro read this:
A unique drawback of the Li-ion battery is that its life span is dependent upon aging from time of manufacturing (shelf life) regardless of whether it was charged, and not just on the number of charge/discharge cycles. This drawback is not widely publicized.
At a 100% charge level, a typical Li-ion laptop battery that is full most of the time at 25 degrees Celsius or 77 degrees Fahrenheit, will irreversibly lose approximately 20% capacity per year. However a battery stored inside a poorly ventilated laptop, may be subject to a prolonged exposure to much higher temperatures than 25 °C, which will significantly shorten its life. The capacity loss begins from the time the battery was manufactured, and occurs even when the battery is unused. Different storage temperatures produce different loss results: 6% loss at 0 °C/32 °F, 20% at 25 °C/77 °F, and 35% at 40 °C/104 °F. When stored at 40% charge level, these figures are reduced to 2%, 4%, 15% at 0, 25 and 40 degrees Celsius respectively
The problem is he didn't quite understand it or remember it. Storing the battery at 40% doesn't reduce the 10-20% loss. What the excerpt talks about is temperature of the environment the battery rests in. It is an interaction effect.
If the battery is at 100% charge, and stored at 40 °C/104 °F, then a 35% reduction will occur. If it is stored at 40% capacity, then a 20% reduction will occur. If it is stored at 100% charge at 0 °C/32 °F a 6% reduction will occur, when if the battery is dropped to 40%, only a 4% reduction will occur.
You bro is wrong in thinking you can stop Li-ion batteries from losing their charge. This happens from the point of manufacturing.
Source: http://en.wikipedia.org/wiki/Lithiumionbattery

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Barney,
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SgtKeebler wrote:
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To add just a little
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http://www.apple.com/batteries/notebooks.html
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Never drain them LOW & dont always/often store them HIGH
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From Apple on batteries:
http://support.apple.com/kb/HT1446
http://www.apple.com/batteries/
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Peace

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edited by: cs

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