Acer aspire e1-572p 사용자 설명서

The computer uses a Lithium battery that gives you long use between 
charges.

The battery is recharged whenever you connect the computer to the 
AC adapter. Your computer supports charge-in-use, enabling you to 
recharge the battery while you continue to operate the computer. 
However, recharging with the computer turned off significantly 
reduces charge time.
The battery will come in handy when you travel or during a power 
failure. It is advisable to have an extra fully charged battery available 
as backup. Contact your dealer for details on ordering a spare battery.

To charge the battery, first make sure that it is correctly installed in the 
battery bay. Plug the AC adapter into the computer, and connect to a 
mains power outlet. You can continue to operate your computer on 
AC power while your battery is charging. However, charging the 
battery with the computer turned off significantly reduces charge time.

Before you use a battery pack for the first time, there is a conditioning 
process that you should follow:
1. Insert the new battery without turning the computer on.
2. Connect the AC adapter and fully charge the battery.
3. Disconnect the AC adapter.
4. Turn on the computer and operate using battery power.
5. Deplete the battery until the battery-low warning appears.