Sony Vaio PCG-745 User Manual page 44

To charge the second battery pack
Keep the battery pack in the computer while it is connected to AC power.
The battery indicator flashes while the battery is charging. See also "To
charge the battery pack" on page 9 for more information.
To determine the amount of time the battery lasts, see "Displaying Battery Information" on
page 68.
To remove the second battery pack
1
There is an Eject lever on the bottom of the weight saver. To remove
the battery pack, slide this lever in the direction of the arrow.
2
Remove the weight saver, and then pull out the battery pack.
3
Re-insert the weight saver. See "Using the Weight Saver" on page 40.
Battery pack (supplied)
Using Your Notebook Computer
Battery indicators
1 2
Second battery pack
(not supplied)
Weight saver Eject lever on bottom
39