Battery icon disappear
One day, i was using my macbook air mid 2011, it said that battery is low, so i charged and continued to finish my work, when i'm done, i took off my charger and then my macbook suddenly shut down, i was confusing and charged one more time, it finally turn on but the battery icon was missing and i go to system preferences>energy saver>show battery status in menu bar, but one thing happened, when i checked, it suddenly unchecked itself quickly, so i cant see if my battery is charging or not, and when i took off again, my macbook is still shutdown,please help !!!!!
MacBook Air