IBM Netfinity ServeRAID-4H Ultra160 User Reference page 30

Battery-backup cache
Figure 1. ServeRAID-4H controller
You can attach internal SCSI devices to the Channel 1 and Channel 2 connectors.
You can attach external SCSI devices to the Channel 1, Channel 2, Channel 3, and
Channel 4 connectors.
CAUTION:
The ServeRAID-4H controller uses a lithium battery.
Statement 2:
CAUTION:
When replacing the lithium battery, use only IBM Part Number 38L3386 or an
equivalent type battery recommended by the manufacturer. If your system has
a module containing a lithium battery, replace it only with the same module
type made by the same manufacturer. The battery contains lithium and can
explode if not properly used, handled, or disposed of.
Do not:
v Throw or immerse into water.
v Heat to more than 100 C (212 F)
v Repair or disassemble
Dispose of the battery as required by local ordinances or regulations.
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IBM Netfinity User's Reference: ServeRAID
Internal Channel 2
Internal Channel 1
External Channel 1
External Channel 2
External Channel 3
External Channel 4
™
-4H Ultra160 SCSI Controller