Ok, I never ever had or used a Laptop before. This is very first Laptop, before this I owned an eMac. So please excuse my lack of knowledge. Can you charge a Macbook? If so, how low should you let it go before charging it? When I am not using my Macbook, should I leave it plugged in or unlpugged? Is it better to shut it down or put it to sleep? Experts, please don't laugh too hard. I just need some help.