You need to take care of the battery in your
The Battery Saver is here to help you.
It is a powerful tool that alerts you precisely when your battery is running low, with the sound you choose and the amount of charge of your own. In addition to the Battery Saver you can also set up a full load of alert, that way you never leave your MacBook with addicted battery.
Battery Saver is the best friend of health of your MacBook.