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Rectangular black laptop battery with three cells and label showing 57Wh 11.4V

DELL

DELL JNYT4 3-cell Li-ion 66DWX 57Wh 11.4V 4878mAh laptop battery for Latitude 7340 7440 7640

SKU CH-NGDG-24QKF

A 57 Wh lithium-ion replacement battery for Latitude 7340, 7440 and 7640 laptops

  • Battery TypeLithium-Ion
  • 57Wh capacity powers Latitude 7340 7440 7640 models
  • 3-cell lithium-ion design delivers 11.4V reliable voltage
  • 4878mAh rating supports extended mobile work sessions
  • Genuine Dell JNYT4 part matches 0JNYT4 original specification

3-cell 57Wh lithium-ion battery for Latitude 7340

This replacement battery delivers 57Wh at 11.4V with a 4878mAh rating across three lithium-ion cells. It is built to fit the Dell Latitude 7340, 7440 and 7640 series laptops. The 66DWX part matches the original form factor for direct installation. It suits owners of those models who need a new power source.

No bundled accessories or software included

The package contains only the battery unit itself. No screws, tools, cables or diagnostic software are supplied. Buyers who need installation hardware or a calibration utility must source those separately. This product does not address the needs of users who require a multi-bay charger or an external power bank.

Highlights

  • 57Wh capacity powers Latitude 7340 7440 7640 models
  • 3-cell lithium-ion design delivers 11.4V reliable voltage
  • 4878mAh rating supports extended mobile work sessions
  • Genuine Dell JNYT4 part matches 0JNYT4 original specification

Specifications

Battery TypeLithium-Ion

Questions about this item

How often will the 3-cell 57Wh lithium-ion battery need replacement?

Replacement timing depends on charge cycles and usage patterns; lithium-ion cells typically degrade after several hundred full cycles.

What is the first limit reached during sustained use of this 11.4V 4878mAh pack?

The 57 watt-hour capacity determines runtime; continuous load drains the 4878mAh cells until the pack reaches its low-voltage cutoff.

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