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462987-B21 ✓ Verified by PartsTable
HPE · BATTERY · LITHIUM
WHAT YOU NEED TO KNOW
Lithium batteries are restricted for air travel and may require a dangerous goods certificate with additional carrier fees. Ground shipping adds transit time — plan accordingly. Always check the date code, batteries degrade over time. Buy in bulk when possible, these are consumables. Key checks: Buy in bulk — consumables.
RESTRICTED for air — DG certificate required
PRODUCT OVERVIEW

The HP 462987-B21 is a Battery-Backed Write Cache pack, designed for HPE Smart Array controllers in ProLiant Gen8 and Gen9 servers. It provides backup power to the BBWC module during unexpected power loss, ensuring cached write data is safely committed to flash memory. This is a high-volume replacement part in TPM market as ProLiant Gen8 and Gen9 servers remain widely deployed.

WHERE IT FITS
BATTERY→ LITHIUM→ 462987-B21
SPECIFICATIONS
Part Number462987-B21
ManufacturerHPE
COMPONENT DIAGRAM
CAP 72V + - CAP 72V BRACKET TO CTRL CABLE: — ~76 mm CACHE BACKUP | Supercapacitor | Cable: — Connects to RAID controller | | Controller: See controller spec SCHEMATIC: + - 2S2P SUPERCAP PACK TITLE CACHE BATT PN 462987-B21 MFR HPE HP 650 mAh P-Series Battery Module
KEY FEATURES
•
Battery-Backed Write Cache Module
•
Rechargeable Battery Technology
Provides cache backup power for 48+ hours after power loss
•
Hot-Plug Capable
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
462976-001Compatible
HP Smart Array Battery 650 mAh Ni-MH for P212 P410 P411
compatible
462969-B21Compatible
HP Smart Array Battery 650 mAh Ni-MH for P212 P410 P411
compatible
460499-001Compatible
HP Smart Array Battery 650 mAh Ni-MH for P212 P410 P411
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveDG Class 9 — LithiumRestricted Air Freight
THIS PART SUBSTITUTES FOR 3
460499-001SUBSTITUTE
HP Smart Array Battery 650 mAh Ni-MH for P212 P410 P411
HPE
462969-B21SUBSTITUTE
HP Smart Array Battery 650 mAh Ni-MH for P212 P410 P411
HPE
462976-001SUBSTITUTE
HP Smart Array Battery 650 mAh Ni-MH for P212 P410 P411
HPE
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FREQUENTLY ASKED QUESTIONS
What is 462987-B21?
462987-B21 is a HP 650 mAh P-Series Battery Module manufactured by HPE. It is classified as a BATTERY (LITHIUM).
What parts can replace 462987-B21?
There are 3 known substitutes for 462987-B21: 462976-001, 462969-B21, 460499-001. Substitute compatibility should be verified for your specific system.
Is 462987-B21 still available?
462987-B21 is currently Unknown.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026