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1. Read the safety information that begins on page Chapter 2, “Safety information,”
on page 3.
2. Turn off the server and peripheral devices and disconnect all power cords and
external cables.
3. Remove the cover (see “Removing the cover” on page 159).
4. Locate the remote battery tray in the server and remove the battery that you
want to replace:
a. Remove the battery retention clip 2 from the tabs 1 that secure the
battery 4 to the remote battery tray 3.
b. Lift the battery and battery carrier from the tray and carefully disconnect the
remote battery cable from the interposer card on the SAS controller.
1 Remote battery cable connector
2 Remote battery cable
c. Disconnect the battery carrier cable from the battery.
d. Squeeze the clip on the side of the battery and battery carrier to remove the
battery from the battery carrier.
Note: If your battery and battery carrier are attached with screws instead of
a locking-clip mechanism, remove the three screws to remove the
208 ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Hardware Maintenance Manual