Macbook Pro shutting off instead of sleeping

Hi my macbook pro is simply switching off when the battery is low rather than putting it self to sleep (and retaining contents of memory) its just clicking and dying instantly - is this a fault? My battery history as reported by coconut is 22 months old, 457 cycles, 79% capacity

I am having the same problem. This battery is the one that replaced the original when there was a recall (not all that long ago). According to coconut the capacity is only 13%.
Do you know if there's any way to salvage this or will I have to purchase a new one?
Battery Information:
Model Information:
Serial Number: Sony-ASMB012-355b-9d0b
Manufacturer: Sony
Device name: ASMB012
Pack Lot Code: 0003
PCB Lot Code: 0000
Firmware Version: 102a
Hardware Revision: 0400
Cell Revision: 0303
Charge Information:
Charge remaining (mAh): 484
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 761
Health Information:
Cycle count: 31
Condition: Check battery
Battery Installed: Yes
Amperage (mA): 1038
Voltage (mV): 12533

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MacBook pro shuts down instead of sleeping while connected to power adapter

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I am currently facing a rather strange issue. My old MacBook pro (about 2 years old) shuts down instead of sleeping but only when it is connected to the power adapter. I mean it goes to sleep mode perfectly well when it works only with the battery. Is it a know issue ? I'm running 10.5.6 and this problem is quite new to me (happened the first time some weeks ago).
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You might try resetting the SMC and see if this helps:
http://support.apple.com/kb/HT1411?viewlocale=en_US
Good luck!

MacBook Pro shuts down instead of sleep

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MacBook Pro shuts down instead of sleeping

My MacBook Pro was asleep on battery power with a near-full charge.
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Thanks.
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Macbook Pro turns off instead of sleep mode

Hello,
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My macbook pro shut off and wont turn on

my macbook pro shut off and wont turn on

Keep holding the power button down for a long time.
If the computer does boot this way, follows these instructions:
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(Haven't updated macbook since bought in 2011)

Yimajatl,
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