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Black rectangular lithium-ion laptop battery 51Wh 11.4V

Beisite

Beisite 7WNW1 laptop battery 51Wh 11.4V for Latitude 5420 5424 7424 Rugged Extreme

SKU CH-S75C-RSVGF

51 Wh 11.4 V lithium-ion replacement battery for Latitude 5420, 5424 and 7424 Rugged Extreme models

  • ColorBlack
  • TypeBattery
  • Compatibilityfor Latitude 5420 5424 7424 Rugged Extreme Series
  • Battery TypeLithium-Ion
  • Battery Voltage11.4V
  • Battery Capacity51Wh
  • Ready for rugged work with 51 Wh capacity
  • Reliable 11.4 V Li-ion power for Latitude 5420 5424 7424
  • Replaces 7WNW1 DMF8C 31CP6/56/77 part numbers
  • Brand-new cell keeps Extreme series running longer
  • 12-month coverage backs every replacement battery

Direct replacement for Dell Rugged Extreme

This 51Wh lithium-ion battery matches the original 11.4V specification for Latitude 5420, 5424 and 7424 Rugged Extreme models. It replaces part numbers 7WNW1, DMF8C, 0DMF8C and 31CP6/56/77. The black pack restores factory runtime without modification.

Low thermal impact and stable voltage

Lithium-ion chemistry delivers consistent 11.4V output with minimal heat during typical office or field workloads. No active cooling is required and the cell pack operates silently. Power draw follows the laptop's own management profile.

Drops into the existing battery bay

The unit fits the Rugged Extreme chassis exactly, using the original latch and connector. No tools, adapters or BIOS updates are needed. It frees the user from tethered AC power and restores full mobility for field service, logistics or outdoor use.

Highlights

  • Ready for rugged work with 51 Wh capacity
  • Reliable 11.4 V Li-ion power for Latitude 5420 5424 7424
  • Replaces 7WNW1 DMF8C 31CP6/56/77 part numbers
  • Brand-new cell keeps Extreme series running longer
  • 12-month coverage backs every replacement battery

Specifications

Brand7WNW1
Model7WNW1
Part Number31CP6/56/77
ColorBlack
TypeBattery
Compatibilityfor Latitude 5420 5424 7424 Rugged Extreme Series
Battery TypeLithium-Ion
Battery Voltage11.4V
Battery Capacity51Wh

Questions about this item

How do I install the 7WNW1 51Wh battery in my Latitude 5420 Rugged Extreme and which step is often missed?

Power off the laptop, remove the AC adapter, undo the bottom case screws, disconnect the old battery cable before lifting it out, connect the new 11.4V pack securely, then reassemble; the step most often missed is unplugging the old battery connector first.

What maintenance or replacement will the 7WNW1 11.4V lithium-ion pack need over time?

Lithium-ion cells degrade with charge cycles; expect reduced runtime after several hundred cycles and plan to replace the 51Wh pack when it no longer holds a useful charge for your workflow.

What is the first limit that appears when the 7WNW1 battery runs under sustained load in a Latitude 7424 Rugged Extreme?

The 51Wh capacity sets the runtime ceiling; under continuous high draw the pack will hit its energy limit and require recharging before the voltage or thermal limits are reached.

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