For information about removing the second battery, see
1. Ensure that the computer is turned off and disconnected from the electrical outlet.
2. If the computer is connected to a docking device (docked), undock it. See the documentation that came with your docking device for instructions.
3. Slide and hold the battery-bay latch release on the bottom of the computer, and then remove the battery from the bay.
Installing a Battery
Ensure that the computer is turned off. Slide the battery into the bay until the latch release clicks.
For information about installing the second battery, see
Storing a Battery
Remove the battery when you store your computer for an extended period of time. A battery discharges during prolonged storage. After a long storage period,