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Technical Data Sheet
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6TW9W ✓ Verified by PartsTable
DELL · 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
DELL 41WH LI-ION BATTERY TYPE G91J0 11.25V

The Dell 6TW9W is a Battery-Backed Write Cache pack, designed for Dell PERC controllers in PowerEdge 12th and 13th generation 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 PowerEdge 12th and 13th generation servers remain widely deployed.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6140-01-708-7645, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
BATTERY→ LITHIUM→ 6TW9W
NSN: 6140-01-708-7645
FSC: 6140
CAGE: 3DMD3 — DELL MARKETING L.P. (USA)
SPECIFICATIONS
Part Number6TW9W
ManufacturerDELL
NSN6140-01-708-7645
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 6TW9W MFR DELL Dell 41WH Li-Ion Battery Type G91j0 11.2
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
TECHNICAL CHARACTERISTICS (FLIS)
BATTERY ELECTROLYTELITHIUM
PART NAME ASSIGNED BY CONTROLLING AGENCYRECHARGEABLE BATTERY PACK
VOLTAGE IN VOLTS11.25
VERIFIED SUBSTITUTES & CROSS-REFERENCES

No verified substitutes available.

LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99DG Class 9 — LithiumRestricted Air Freight
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FREQUENTLY ASKED QUESTIONS
What is 6TW9W?
6TW9W is a Dell 41WH Li-Ion Battery Type G91j0 11.25V manufactured by DELL. It is classified as a BATTERY (LITHIUM).
What is the NSN for 6TW9W?
6TW9W is cataloged in the Federal Logistics Information System (FLIS) under NSN 6140-01-708-7645. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026