IBM x3455 - System - 7984 User Manual page 14

Statement 28:
CAUTION:
The battery is a lithium ion battery. To avoid possible explosion, do not burn
the battery. Exchange it only with the IBM-approved part. Recycle or discard
the battery as instructed by local regulations. In the United States, IBM has a
process for collection of this battery. For information, call 1-800-426-4333.
Have the IBM part number for the battery unit available when you call.
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System x3455 Types 7984 and 7986: User's Guide