To dislodge the battery from its retainer, use your finger to gently push the
top edge of the battery away from the retainer.
Note -
To gain access to the battery, you might need to disconnect and move aside
the auxiliary signal cable to the disk backplane and the SAS cables to the
Internal HBA. For more information, see Servicing the Disk Backplane (FRU) and Servicing SAS Cables (FRU).