I'm using macbook air,and the charger is plugged into it,the battery is full right now,so where is the power source from when it's running?Battery or directly from cable?
Power cable. If the electrical power fails, your laptop will automatically begin using the battery power.
I see power cable that is direct power. Mac book charges its laptop battery while working like other laptop as well. As Apple applies some distinctive technologies, they have their own standard in some fields. Then is there anything special to maintain Mac book battery? The key point to extend the battery on laptop's life is quite simple and easy. Most users expect that their battery can be used as long as it can. Mac book users bad habit indirectly result in short battery life no matter the Mac book battery or other common batteries. The following illustrations are obvious to show you how to achieve it. Once you start your Mac book, press the dimming button to lower the screen brightness. Then check the ongoing programs. These operating programs consume a lot power. The next step is to adjust energy saver options. Otherwise, you Mac book will use up the battery power once you leave it idle. More over, CD-driver is another big consumer of laptop battery power. Take out of the CD from the drive if you have no special use.
