MB Pro shuts off at around 85% battery power.

I've been using the power adapter pretty much all the time with my MBP but now that I've been using it on battery power it has automatically shut off at around 85% battery power. I haven't always had the battery in while using the charger but for the last year I have. I'm not sure if that has any relevance.

Actually, it IS within the specification +for battery health+, which is what I stated above. Apple states, +"A properly maintained Apple notebook battery is designed to retain up to 80% of its original capacity at 300 full charge and discharge cycles."+ This is based on the reading for Full Charge Capacity in System Profiler. BGTD's full charge capacity is 5081 mAh, and the nominal new full charge capacity of a 15" MBP battery is 5500 mAh (rounded down, the calculated value is actually 5556 mAh). Even of the OP has a 17" MBP, the battery is still within health (though barely so - the denominator for a 17" MBP battery is 6300 mAh.
So, despite having an acceptable capacity (i.e., 'health'), the OP's MBP is shutting down with only 15% of the capacity used. As I stated, that's a symptom of a faulty battery.
Furthermore, you are also incorrect when you state, +"if your MBP is over 1 year old, Apple will NOT replace your battery."+ You can certainly state that Apple did not replace your battery free of charge, and I'm sorry for that! On the other hand, my health dropped suddenly to ~60% when my MBP was 16 months old. I +do not+ have AppleCare, and despite that, the Genius Bar replaced my battery for free. The page that I linked to (the top link) states, +"This program extends repair coverage on the battery for up to two years from the date of purchase of the computer for Intel Core Duo-based MacBook and MacBook Pro computers."+ I also pointed out that I am aware of Apple having replaced (for free) batteries of users with Core 2 Duo MBPs under the same program.
As I stated, the best bet is for the BGTD is to visit an Apple Store or call AppleCare and request a replacement battery, based on the information above. The answer may be "no," but I'd argue that it's worth a little effort to try and save US$130, given that there are known and Apple-acknowledged issues with some notebook batteries.

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DAKINGGOD wrote:
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Model Information:
Serial Number: SMP-ASMB014-36f0-** <Edited by Moderator>
Manufacturer: SMP
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Voltage (mV): 12593

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MB Pro shuts off at around 85% battery power.

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