If your speaker goes out, or if a strip on the screen becomes unresponsive to the touch, or if it starts dropping calls for no reason because the antenna inside came unattached.
It does cover battery replacement, should the battery be defective during the warranty period. It doesn't cover normal wear-and-tear of the battery. (i.e. if you only get 80% charge after 300 battery cycles, that's considered normal)
If your speaker goes out, or if a strip on the screen becomes unresponsive to the touch, or if it starts dropping calls for no reason because the antenna inside came unattached.
It does cover battery replacement, should the battery be defective during the warranty period. It doesn't cover normal wear-and-tear of the battery. (i.e. if you only get 80% charge after 300 battery cycles, that's considered normal)
The MacBook battery is considered a consumable part, like the iPhone battery. If it is behaving abnormally, they'll cover it. If it's simply not holding a charge because you've got a gazillion cycles on it, then no.
As for other reasons you'd might want AppleCare on an Apple notebook, ... same idea as the iPhone. There are a lot of other components inside the MacBook besides the battery that may fail. Hard drives and SuperDrives are the most likely candidates.
It is covered in only 1 yr time eventhough u took the 3 yrs apple care plan...this is just for battery...the rest i'm not too sure...i change my battery 1 month after purchased FYI...