Dell Latitude D530 (Early 2008) - Manual (Page 46)

46 Using a Battery
1 If the computer is connected to a docking device (docked), undock it. See
the documentation that came with your docking device for instructions.
2 Ensure that the computer is turned off.
3 Slide the battery-bay latch release on the bottom of the computer, and
then remove the battery from the bay.
To replace the battery, follow the removal procedure in reverse order and press
down until the battery-bay latch release fully engages.
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, recharge the battery fully (see "Charging the Battery" on page 45)
before you use it.