Sony PCG-GRX500K - Manual (Page 37)

Using a Second Battery Pack
37
To charge the second battery pack
Keep the battery pack in the notebook while it is connected to AC power. The
battery indicator flashes while the battery is charging. See “To charge the battery
pack” in the printed Quick Start for more information.
Using Weight Saver for Second Battery Cover
Charging the Second Battery
✍
To determine the amount of time the battery lasts, see “Displaying Battery
Information” for details.
Battery pack
Weight saver
Battery indicators