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Black rectangular 3-cell 51Wh 11.4V rugged laptop battery

DELL

DELL Latitude 5420 5424 7424 Rugged 3-cell 51Wh 11.4V laptop battery 7WNW1

SKU CH-BRDN-V9T4V

Genuine Dell OEM 3-cell 51Wh 11.4V Lithium-Ion battery for Latitude 5420, 5424 and 7424 Rugged laptops

  • Battery typeLithium-Ion
  • Battery voltage rating11.4 V
  • Product colorBlack
  • Product typeBattery
  • Genuine Dell OEM part ensures exact fit and reliable performance
  • 51Wh capacity delivers extended runtime for demanding field work
  • 4V 3-cell Lithium-Ion chemistry provides stable power output
  • Compatible with Latitude 5420 Rugged, 5424 Rugged and 7424 Rugged Extreme
  • Multiple Dell part numbers covered: DMF0C, 6NNCF, DP3KF, GK3D3

Genuine Dell rugged battery

This is a genuine Dell OEM 3-cell lithium-ion battery built for Latitude 5420 Rugged, 5424 Rugged and 7424 Rugged Extreme laptops. It replaces part numbers DMF0C, 6NNCF, DP3KF and GK3D3. The unit ships new in black and is identified by type number 7WNW1. It restores factory power specifications for the listed rugged models.

Thermals and power profile

The 51Wh pack operates at 11.4V using standard lithium-ion chemistry. Normal discharge generates modest heat that the host laptop manages through its existing thermal design. No active cooling or additional power circuitry is required beyond the notebook's own charging system. Acoustic impact is zero because the battery has no moving parts.

Build and daily use

The black plastic housing matches the original rugged chassis aesthetic and locks into the dedicated battery bay without tools. Three cells keep the profile slim so the laptop retains its sealed rugged rating when installed. Connectors are keyed to prevent mis-insertion during field swaps. Users who need longer runtime away from mains power should note the fixed 51Wh capacity.

How it compares

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

Price $92.99
Pricier than about 90% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameDELL
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion
Battery voltage rating11.4 V

Questions about this item

How do I install the 3-cell 51Wh 11.4V battery in my Latitude 5420 Rugged and what step is often missed?

Power off the laptop, slide the release latch, remove the old pack, insert the new 7WNW1 battery until it clicks, then re-engage the latch; the step often missed is fully seating the latch so the pack cannot shift.

What maintenance or replacement will the 3-cell Lithium-Ion 51Wh pack need over time?

The pack is sealed and maintenance-free; capacity loss from charge cycles will eventually require replacing the entire 7WNW1 unit when runtime no longer meets your needs.

What limit appears first on the 11.4V 51Wh battery during sustained heavy workloads?

Under sustained load the 3-cell pack hits its thermal and voltage limits first, causing the system to throttle performance to protect the cells.

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