Acer Altos R720 Series - Manual (Page 104)

3 System upgrade 94
Removing and installing the RAID BBU
To remove the RAID BBU:
1 Observe the ESD precautions and pre-installation instructions
described on page 35.
2 Remove the air baffles. See “Removing and installing the air
baffles” section on page 42.
3 Disconnect the battery cable from the SAS mid-plane board (A)
and detach it from the chassis (B).
4 Remove the battery holder from the chassis.
5 Open the battery holder (A), then detach the cable inside the
battery pack (B).
6 Remove the RAID BBU from the chassis.
7 Replace the air baffles and CPU air duct.