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Black rectangular laptop battery with connector strip

GreenTechLLC

GreenTechLLC RWFFJ laptop battery for Dell XPS 16 9640 11.7V 99.5WHR 8504mAh

SKU CH-X3VA-26RSD

Replacement 6-cell lithium-ion battery delivering 11.7 V and 99.5 Wh for Dell XPS 16 9640 models

  • Battery type6 Cell Lithium-Ion
  • Battery voltage rating11.7 V
  • Battery capacity8504mah
  • Measurements12 × 3.6 × 0.5 in
  • Product colorBlack
  • Product typeBattery
  • 5 Wh capacity powers Dell XPS 16 9640 through long sessions
  • 7 V lithium-ion chemistry delivers stable voltage under load
  • 6-cell pack replaces OEM RWFFJ, 0J8FK9, J8FK9, CN-0J8FK9 exactly
  • CE, FCC, RoHS certified for safe daily operation
  • Compact 12 × 3.6 × .5 in design fits the original battery bay

Dell XPS 16 9640 replacement battery

This GreenTechLLC RWFFJ battery is a new 6-cell lithium-ion pack built for the Dell XPS 16 9640 series, including the XPS9640-7097SLV-PUS model. It delivers 11.7V and 99.5WHR capacity to restore original runtime for owners whose factory cell has degraded.

Tested circuit protection and safety certifications

Each unit is checked for correct voltage, stable current, low self-discharge and built-in circuit protection before shipping. The pack carries CE, FCC and RoHS certification, so the replacement meets recognised electrical-safety and substance-restriction standards without extra configuration.

Fixed 99.5 WHR capacity and proprietary form factor

The 8504mAh rating is the maximum energy this pack stores; it cannot be expanded or swapped for a higher-capacity cell. Its 12 by 3.6 by 0.5 inch dimensions and Dell-specific connector limit use to the listed XPS 16 9640 chassis, so buyers needing longer runtime or a different laptop model must look elsewhere.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $60.99
Pricier than about 90% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameGreenTech
Model nameRWFFJ, 0J8FK9, J8FK9, CN-0J8FK9
Part numberRWFFJ, 0J8FK9, J8FK9, CN-0J8FK9
Product colorBlack
Product typeBattery
Power
Battery type6 Cell Lithium-Ion
Battery voltage rating11.7 V
Battery capacity8504mah
Size & build
Measurements12 × 3.6 × 0.5 in
Product weight1 lb (0.45 kg)
Compatibility
Compatible withDELL XPS 16 9640, XPS 9640, XPS9640-7097SLV-PUS

Questions about this item

How often will the 6-cell lithium-ion pack need replacement under normal use?

Capacity gradually declines after hundreds of full charge cycles; most users replace it when runtime no longer meets their needs.

What limits sustained operation before the 99.5 Wh pack requires a recharge?

The 8504 mAh capacity at 11.7 V determines how long the XPS 16 9640 runs on battery alone.

Does the battery generate noticeable heat or noise during all-day workloads?

Lithium-ion cells produce no noise and only mild warmth under typical loads; no fan or moving parts are present.

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