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787521-005 ✓ Verified by PartsTable
HP · 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 787521-005 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→ 787521-005
SPECIFICATIONS
Part Number787521-005
ManufacturerHP
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 787521-005 MFR HP HP Battery (Primary) - 3-cell lithium-io
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

No verified substitutes available.

LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveDG Class 9 — LithiumRestricted Air Freight
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FREQUENTLY ASKED QUESTIONS
What is 787521-005?
787521-005 is a HP Battery (Primary) - 3-cell lithium-ion, 3.25Ah, 37Wh manufactured by HP. It is classified as a BATTERY (LITHIUM).
Is 787521-005 still available?
787521-005 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