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42R8305 ✓ Verified by PartsTable
IBM · CONTROLLER · RAID_HBA
WHAT YOU NEED TO KNOW
RAID HBAs — always confirm bracket height (full or half). Ship unlocked with test reports. Our edge: we can verify specific firmware versions. Key checks: Ship with test reports. Ship UNLOCKED.
Firmware must match server
PRODUCT OVERVIEW

IBM RAID Controller Battery for IBM 2780, 5580, 5708, 5780. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
CONTROLLER→ RAID_HBA→ 42R8305
SPECIFICATIONS
Part Number42R8305
ManufacturerIBM
COMPONENT DIAGRAM
RAID ASIC CACHE FBWC SAS 0 SAS 1 SAS 2 SAS 3 BATT EXT 0 EXT 1 PCIe x8 ~187 mm STORAGE CONTROLLER | RAID 0,1,5,6,10 | PCIe SAS/SATA | FBWC cache | Battery backup connector | TITLE RAID CTRL PN 42R8305 MFR IBM IBM RAID Controller Battery for IBM 2780
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 2
39J5554Compatible
IBM Cache Battery for iSeries RAID Controller 3.7v 3.9Ah 14.4Wh - RoHS
compatible
97P4846Compatible
IBM Cache Battery for iSeries RAID Controller 3.7v 3.9Ah 14.4Wh - Non RoHS
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 2
97P4846SUBSTITUTE
IBM Cache Battery for iSeries RAID Controller 3.7v 3.9Ah 14.4Wh
IBM
39J5554SUBSTITUTE
IBM Cache Battery for iSeries RAID Controller 3.7v 3.9Ah 14.4Wh
IBM
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FREQUENTLY ASKED QUESTIONS
What is 42R8305?
42R8305 is a IBM RAID Controller Battery for IBM 2780, 5580, 5708, 5780 manufactured by IBM. It is classified as a CONTROLLER (RAID_HBA).
What parts can replace 42R8305?
There are 2 known substitutes for 42R8305: 39J5554, 97P4846. Substitute compatibility should be verified for your specific system.
Is 42R8305 still available?
42R8305 is currently Unknown.
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Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
Last verified: July 2026