my battery doesn´t charge any more, sdo I need to change it?
letting your battery deplete its charge is ruinous on the lithium battery cells.
Dont ever do that if possible, it causes premature battery death.
Considerations for the long life of your Macbook Air. Handling and environmental care tips
Reset SMC. http://support.apple.com/kb/HT3964
Choose the method for:
"Resetting SMC on portables with a battery you should not remove on your own".
If this does not help, contact Apple.
Genius Bar reservation
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