IBM ServeRAID-4 Ultra160 Series User Reference page 26

Note: The ServeRAID-4L and ServeRAID-4Lx controllers use the module (P/N
38L3386) containing a lithium battery.
Statement 2
CAUTION:
When replacing the lithium battery, use only IBM Part Number 33F8354 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.
8
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IBM User's Reference: ServeRAID -4 Ultra160 SCSI Controller