Last night my battery and my MacBook Pro decided not to talk to each other anymore. The battery was full but as soon as I unplugged the AC, the laptop shut down immediately, fairly useless 
Have a look at Apple’s support case MacBook Battery Update.
This patch apparently prevent the synchronization failure to happen, saving you a WFT moment and few hours of downtime.
I have been fairly impressed by the Genius bar support. It took me 1h to figure it out the problem in the morning (The Apple support website roughly described my problem), I made an appointment right away, another hour later I had my new battery operational (travel time included).
At least, they don’t argue with you and don’t ask if you know how to turn the power on. It’s a big plus compared to other support organizations.
It is “a MacBook Pro”