Is this normal. After 6 months of never using my macbook I booted it up and noticed the battery is dead. It only works when plugged in. If I unplug the power adapter it immediately shuts off. It wont charge either. I left my macbook plugged in for days and it wont re-charge. Is it dead for good and I need to buy a new one or is their a way to bring it back to life? Hope you geniuses can help.