81Y4579 — Battery Module Specs

IBM · BATTERY · SUPERCAP

WHAT YOU NEED TO KNOW

Supercapacitors have long duration but they wear out. We recommend buying new when possible, though refurbished can work. Always check the date code.

Long duration but wear out

PRODUCT OVERVIEW

IBM BATTERY CAPACITOR PACK 13.5V 6.4F

The IBM 81Y4579 is a Flash-Backed Write Cache capacitor pack, designed for enterprise RAID controllers in enterprise servers. It provides backup power to the FBWC module during unexpected power loss, ensuring cached write data is safely committed to flash memory. Unlike traditional batteries, the supercapacitor design offers a longer operational lifespan with no scheduled replacement cycles and no temperature-related degradation.

This is a high-volume replacement part in TPM market as enterprise servers remain widely deployed.

WHERE IT FITS

BATTERY→ SUPERCAP→ 81Y4579

SPECIFICATIONS

Drive Bays

1x 3.5" LFF

BROWSE IBM MACHINES

160/320Gb Escon Tape Drive Int (Ts1130) 1600/3200Gb Lto Tape FC-8Gb Hh (Ts3100/Ts3200) 2145-Sv1 San Volume Controller 2147-Sa2 San Volume Controller 2500/6250Gb Lto Tape FC-8Gb (Ts3310) 2812 Xivg2 2Tb Data Module (Fc 1126) 2812 Xivg2 2Tb Interface Module (Fc 1125) 2812 Xivg2 2Tb Lv Cod Data Module (Fc 1117) 3.5Ghz Cpu 12C (Fc Epxh) Power8 4/24-Port FC-8Gb San Switch (San06B-R) 7042 Hmc 2.4Ghz/15Mb/6C (E5-2620V3) 8247-22L (S22L) Power8

All IBM machines and parts

COMPONENT DIAGRAM

KEY FEATURES

•

Flash-Backed Write Cache Capacitor

•

Supercapacitor Technology

Longer lifespan than traditional batteries — no scheduled replacement cycles

•

Hot-Plug Capable

•

No Maintenance Required

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

SUBSTITUTES & CROSS-REFERENCES 3

00JY023SubstituteBROKER-VERIFIED

IBM Serverraid M5100 Series Battery

substitute

00JY022SubstituteBROKER-VERIFIED

IBM Battery Capacitor Pack 13.5V 6.4f

substitute

47C8696CompatiblePARTNER

IBM Cache Battery Capacitor for RAID for M5200 Series - FRU

compatible

LIFECYCLE

No lifecycle data available.

THIS PART SUBSTITUTES FOR 2

00JY023SUBSTITUTE

IBM Cache Battery Capacitor for RAID for M5100 Series - FRU

IBM

47C8696SUBSTITUTE

IBM Cache Battery Capacitor for RAID for M5100 Series - FRU

IBM

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FREQUENTLY ASKED QUESTIONS

What is 81Y4579?

81Y4579 is a IBM Battery Capacitor Pack 13.5V 6.4f manufactured by IBM. It is classified as a BATTERY (SUPERCAP).

What parts can replace 81Y4579?

There are 3 known substitutes for 81Y4579: 00JY023, 00JY022, 47C8696. Substitute compatibility should be verified for your specific system.

Is 81Y4579 still available?

81Y4579 is currently Unknown.

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81Y4579 — Battery Module Specs

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