Sony VAIO PCG-V505EC User Manual page 14

Removing a battery
If you are not using the computer for an extended period of time, remove the battery from the computer to avoid damaging
the battery. You can remove the battery when the computer is on or off.
If the computer is on, connect the AC adapter and exit a power saving mode before you remove the battery.
To remove a battery
1. Turn the computer over, and slide the UNLOCK/LOCK latch on the bottom of the computer to the UNLOCK
position.
2. Push and hold the RELEASE latch.
3. While holding the RELEASE latch, slide the battery away from the computer.
Rem ov ing a Battery
Page 14