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PartsTable / BATTERY / 42T4793
42T4793 ✓ Verified by PartsTable
LENOVO · 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 LENOVO 42T4793 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→ 42T4793
SPECIFICATIONS
TypeBattery
Depth56 mm
Width206 mm
Height20 mm
Weight340 g
Product colourBlack
Battery voltage10.8 V
Battery capacity57 Wh
Quantity per pack1 pc(s)
Battery technologyLithium-Ion (Li-Ion)
Compatible productsThinkPad L410, L412, L420, L421, L510, L512, L520, T410, T410i, T420, T510, T510i, T520, W510, W520
Harmonized System (HS) code84732990
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 42T4793 MFR LENOVO Lenovo ThinkPad Battery 70+ (6 cell)
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 12
42T4790Compatible
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - APN
compatible
42T4791Compatible
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
compatible
42T4792Compatible
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - APN
compatible
42T4794Compatible
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - APN
compatible
42T4795Compatible
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
compatible
42T4796Compatible
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - APN
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveDG Class 9 — LithiumRestricted Air Freight
THIS PART SUBSTITUTES FOR 20
42T4790SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4791SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4792SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4794SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4795SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4796SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4797SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4818SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4819SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4852SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4911SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4920SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4921SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4922SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4923SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4924SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4925SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4926SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
42T4927SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
57Y4185SUBSTITUTE
IBM Notebook Battery 6-Cell 57Wh 10.8V 5.2Ah Li-Ion - ThinkPad 55+ - FRU
LENOVO
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FREQUENTLY ASKED QUESTIONS
What is 42T4793?
42T4793 is a Lenovo ThinkPad Battery 70+ (6 cell) manufactured by LENOVO. It is classified as a BATTERY (LITHIUM).
What parts can replace 42T4793?
There are 12 known substitutes for 42T4793: 42T4790, 42T4791, 42T4792 and 9 more. Substitute compatibility should be verified for your specific system.
Is 42T4793 still available?
42T4793 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