Acer EN714-51W User Manual page 55

Battery pack - 55
Step 3. Lift the battery out of the battery bay.
Important
Only use Acer-approved accessories (adapter, power cord, battery,
etc.).
Note
Your hot-swappable battery can be swapped without interrupting the
computer's performance. Save all necessary files to prevent data loss before
exchanging the battery. After removing the hot-swappable battery, replace it
immediately with another battery to avoid power loss.