Laptop battery consumption

[mdovell at comcast.net]

One thing I like on Ubuntu is it gives me more specific information on my laptop battery. Unfortutatly it is now down to 66%-75% range in terms of power. Is there any way to recalibrate batteries in terms of making them perform longer? I've heard some suggest you have it running with very little and drain it and then recharge..does this sound right? 
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