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42T4925 — Lenovo Battery pack 6 cell Li-ion (2.2 Ah)

LENOVO · BATTERY · LITHIUM
PRODUCT OVERVIEW

42T4925: Lenovo Battery pack 6 cell Li-ion (2.2 Ah).

The LENOVO 42T4925 is a Battery-Backed Write Cache pack, designed for enterprise RAID controllers in enterprise 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 enterprise servers remain widely deployed.

WHERE IT FITS
BATTERY→ LITHIUM→ 42T4925
SPECIFICATIONS
Part Number42T4925
ManufacturerLENOVO
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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 42T4925 MFR LENOVO Lenovo Battery pack 6 cell Li-ion (2.2 A
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
SUBSTITUTES & CROSS-REFERENCES 20
42T4755SubstituteBROKER-VERIFIED
Li-Ion 2200 mAh
substitute
42T4923SubstituteBROKER-VERIFIED
Lenovo Battery pack 6 cell Li-ion (2.2 Ah)
substitute
42T4921SubstituteBROKER-VERIFIED
42T4921
substitute
42T4751SubstituteBROKER-VERIFIED
10.8V 5200mAh
substitute
42T4927SubstituteBROKER-VERIFIED
Lenovo Battery pack 6 cell Li-ion (2.2 Ah)
substitute
42T4753SubstituteBROKER-VERIFIED
Lenovo Battery pack 6 cell Li-ion (2.2 Ah)
substitute
LIFECYCLE

No lifecycle data available.

THIS PART SUBSTITUTES FOR 20
42T4790SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4791SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4792SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4793SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4794SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4795SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4796SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4797SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4818SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4819SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4852SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4911SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4920SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4921SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4922SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4923SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4924SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4926SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4927SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
57Y4185SUBSTITUTE
IBM Notebook Battery 6-Cell 48Wh 10.8V 4.4Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
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FREQUENTLY ASKED QUESTIONS
What is 42T4925?
42T4925 is a Lenovo Battery pack 6 cell Li-ion (2.2 Ah) manufactured by LENOVO. It is classified as a BATTERY (LITHIUM).
What parts can replace 42T4925?
There are 20 known substitutes for 42T4925: 42T4755, 42T4923, 42T4921 and 17 more. Substitute compatibility should be verified for your specific system.
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PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.