5181 Views 2 Replies Latest reply: Jun 1, 2010 6:22 PM by Michael C Payne
Approximately 500 cycles, more or less. If the battery is not used most of the time then eventually it will stop holding a charge after two or three years.
Apple stipulates that a normally used battery should retain about 80% of full charge capacity up to 300 cycles.
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
MacBook and MacBook Pro- Mac reduces processor speed when battery is removed while operating from an A-C adaptor
As a follow up, here is the battery info:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 3842
Remaining Capacity (mAh): 3749
Amperage (mA): -1470
Voltage (mV): 12036
Cycle Count: 104
AC Charger Information:
If it makes a difference, the charge states 98% as we speak (9:22 pm Eastern Time), on June 1, 2010.