Dell Vostro 220 (Late 2008) - Manual (Page 118)

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Coin-Cell Battery
5 Carefully press the release latch away from the battery to allow the battery
to pop up from the socket.
6 Remove the battery from the system and properly dispose of the battery.
Replacing the Coin-Cell Battery
1 Insert the new battery into the socket with the side labeled "+" facing up,
and then snap the battery into place. Ensure that it is securely retained
within the battery socket.
2 For the Vostro 220s, replace the chassis support bracket (see "Replacing the
Chassis Support Bracket" on page 57).
3 Follow the procedure in "After Working on Your Computer" on page 45.
4 Enter the system setup program (see "System Setup Program" on page 129
for instructions) and restore the settings you recorded in step 1. Also, enter
the correct date and time.
1 release latch 2 battery (positive side)
2
1