Currently Being ModeratedApr 12, 2013 4:01 AM (in response to Ruthbetteridge)
See the Apple article below.
Currently Being ModeratedApr 12, 2013 5:17 PM (in response to Ruthbetteridge)
The macbook battery system is designed not to charge the battery fully in short cycles. This is to prolong the battery life. I found with my macbook pro that if i take it off the charger and run it on battery power until the battery is completely drained then it will usually go right up to 100%.
You can also see detailed information about your battery and what's happening in Applications -> Utilities -> System Information -> Power -> Battery Information