Acer Aspire R7-571 User Manual page 62

Warning! Connect the AC adapter as soon as possible after the
battery-low warning appears. Data may be lost if the battery is
allowed to become fully depleted and the computer shuts down.
When the battery-low warning appears, the recommended course of
action depends on your situation:
Situation
The AC adapter
and a power outlet
are available.
The AC adapter or
a power outlet is
unavailable.
62 - Battery pack
Recommended Action
1. Plug the AC adapter into the computer, and then
connect to the main power supply.
2. Save all necessary files.
3. Resume work.
Turn off the computer if you want to recharge the
battery rapidly.
1. Save all necessary files.
2. Close all applications.
3. Turn off the computer.