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Rectangular black laptop battery with label showing 65Wh 11.1V 6-cell

DELL 65Wh 11.1V 6-Cell Laptop Battery T54FJ 8858X

SKU CH-Q2YR-91MX2

65 Wh lithium-ion battery fits Dell Latitude E6420, E6430, E6440, E6520, E6530, E6540 and Inspiron 14R, 15R, 17R series

  • TypeCharger
  • CompatibilityT54FJ 8858x Laptop Battery for Dell Latitude E6420 E6430 E64
  • Battery Type96W
  • Battery Voltage20V
  • AC Adapter Voltage20V
  • AC Adapter Output Power85W
  • 65Wh capacity keeps the laptop running longer
  • 1V 6-cell lithium-ion design matches original power specs
  • Direct replacement for Dell Latitude E6420 E6430 E6440 E6520 E6530 E6540 series
  • Fits Dell Inspiron 14R 15R 17R and Precision M2800 models
  • Original dimensions allow full lid opening and docking station fit

65Wh 11.1V 6-cell replacement battery

This lithium-ion battery delivers 65 watt-hours at 11.1 volts across six cells. It matches the original Dell dimensions so the lid opens fully and the laptop still fits in a docking station. Compatible models include Latitude E6420, E6430, E6440, E6520, E6530, E6540, E5420, E5430, E5520, E5530 and Precision M2800. Inspiron 14R, 15R and 17R series are also supported.

Sustained discharge on typical workloads

The 65Wh capacity provides consistent energy delivery during extended sessions rather than only brief peaks. Lithium-ion chemistry maintains stable voltage through most of the discharge cycle. The pack replaces part numbers such as 8858X, T54FJ, 312-1163, 312-1242 and 312-1310. It is a direct swap for the original equipment battery.

Thermals and power draw in daily use

Normal operation keeps cell temperatures within design limits because the pack fits the original bay without obstructing airflow. No additional cooling is required beyond the laptop's own system. The 11.1V output matches the device's charging circuit, so power draw remains as specified by the manufacturer. Weight is 11.7 ounces.

Highlights

  • 65Wh capacity keeps the laptop running longer
  • 1V 6-cell lithium-ion design matches original power specs
  • Direct replacement for Dell Latitude E6420 E6430 E6440 E6520 E6530 E6540 series
  • Fits Dell Inspiron 14R 15R 17R and Precision M2800 models
  • Original dimensions allow full lid opening and docking station fit

Specifications

BrandDELL
ModelE6420
Part NumberE6420
TypeCharger
CompatibilityT54FJ 8858x Laptop Battery for Dell Latitude E6420 E6430 E6440 E6520 E6530 E6540 E5520 E5530 E5420 E5430, Inspiron 17r-7720 17r-se-7720 17r-5720 15r-5520 15r-7520 [65Wh 11.1V 6 Cell]
Battery Type96W
Battery Voltage20V
AC Adapter Voltage20V
AC Adapter Output Power85W
Featureslithium_ion, Rechargeable, 11.1 volts, 65 watt_hours, T54FJ 8858x Laptop Battery for Dell Latitude E6420 E6430 E6440 E6520 E6530 E6540 E5520 E5530 E5420 E5430, Inspiron 17r-7720 17r-se-7720 17r-5720 15r-5520 15r-7520 [65Wh 11.1V 6 Cell], Laptop
Weight11.7 ounces

Questions about this item

Does the 65 Wh lithium-ion pack run hot or draw extra power during a full workday?

The 11.1 V 6-cell design matches the original Dell specification, so heat and power draw stay within the laptop's normal thermal envelope.

Which Dell models already in my bag will accept this T54FJ 8858X battery without an adapter?

It fits Latitude E6420, E6430, E6440, E6520, E6530, E6540, E5420, E5430, E5520, E5530, Precision M2800 and Inspiron 14R, 15R, 17R series listed in the compatibility table.

Will the battery's shape let my Latitude E6430 still sit in its E-Port docking station?

Yes, the dimensions are identical to the original Dell pack, so the lid opens fully and the laptop seats correctly in the dock.

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