How Many Cycles Should A MBP Battery Last?

Expected life is 500 cycles, but your mileage may vary. See the following:

About Batteries in Modern Apple Laptops

Apple - Batteries - Notebooks
Extending the Life of Your Laptop Battery
Apple - Batteries
Determining Battery Cycle Count
Calibrating your computer's battery for best performance
Battery University

200-300 cycles according to Apple

Not so. Apple guarantees the battery will retain 80% of capacity at 300 cycles. The average life is 500 cycles. See Apple - Batteries - Notebooks.

Hi there,

I have been having issues with my battery, I bought my macbook in August 2007, and have experienced in the last months a huge drop in my battery. I have just reached cycle 301 and for what I have been reading in the Apple site after 300 cycles the battery should be lasting 80%. Now it's hardly reaching an hour. My charge capacity is now in 1991.
I called Apple but they say it's normal, that a battery has a lifetime, and that my serial number does not enter the exchange program.
Is it normal that after 1 year and months, and just reaching my 300 cycles I only get 40 min to an hour of my battery. Can anyone help me??

It's not impossible. Now that you've exceeded the 300 cycle point you are no longer eligible for any replacement. The guarantee is not "after" but at 300 cycles. If you have more than 300 cycles the battery is not considered defective.

The average life of Li-poly batteries is 500 cycles. Some go earlier, some go later.

Thanks for the help, I was expecting that kind of comment. Got to late on reacting about the issue I guess, I was having my last hope in finding a way to get the replacement. Thanks anyway,

Maru

I got my macbook pro around the same time, my cycle count is only 66 and the condition says "check battery".. the battery only lasts about 1 minute before it shuts off..
Here is some info about it:
Model Information:
Serial Number: Sony-ASMB012-368c-2856
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): 1958
Fully charged: Yes
Charging: No
Full charge capacity (mAh): 2018
Health Information:
Cycle count: 66
Condition: Check battery
Battery Installed: Yes
Amperage (mA): -507
Voltage (mV): 12148


Would I be eligable for a replacement?? If so how would I go about doing so?
Thanks alot.