For example, I've got a 13.3 inch MacBook (white). It's the old model, so it has a battery that keeps about 4 hours and a half. coconutBattery says the following for my battery:
- Current Battery Charge: 5137 mAh
- Maximum Battery Charge: 5137 mAh
- Current Battery Capacity: 5137 mAh
- Original Battery Capacity 5020 mAh (it results that my battery is 100% health)
Newer models of MacBook White have better batteries, which keep up to 7 hours, and support up to 1000 charges.
And, if the Current Battery Charge is lower than Maximum Battery Charge and your Mac says that battery is charged, do NOT panic! It is something normal. Current battery charge usually fluctuates between 100% and maximum 92% of its current capacity. It is something known.
Download coconutBattery from here: http://www.4shared.com/file/217080977/1d9ac5ac/coconutBattery_265.html