Re: Baterry! Please help me!
Hello and welcome to mac-help.com!
For optimum battery life you want to keep it either draining or charging at all times. (For example, you don't want to always keep it plugged in and at 100%.) You don't have to let go to empty before recharging, you can unplug or recharge at any percentage. And it's totally fine to use your MacBook or shut it down while charging.
If you are storing your MacBook for awhile, it's recommended you do that at about 50% battery power, then drain and charge it once a month.
Here are more
tips from Apple.