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Rectangular silver laptop battery pack 8.0 by 1.5 by 0.8 cm

Dr. Battery

Dr. Battery 4RXFK laptop battery Dell XPS 14 L421X 14.8V 4662mAh

SKU CH-JE8K-XZX18

Replacement Li-polymer battery delivers 14.8V and 4662mAh for Dell XPS 14 L421X Ultrabook models

  • TypeBattery
  • CompatibilityDell 421x-1046 / Dell XPS 14 (L421X) / Dell XPS 14 L421X Ult
  • Battery TypeLi-polymer
  • Battery Voltage14.8V
  • Battery Capacity4662 mAh
  • FunctionNotebook
  • Li-polymer chemistry provides stable daily power
  • 8 V / 4662 mAh capacity matches original spec
  • OEM-grade cells extend usable runtime per charge
  • Built-in protection guards against over-charge and short-circuit
  • Fits Dell XPS 14 L421X Ultrabook series laptops

Designed for Dell XPS 14 L421X

This Dr. Battery Professional Series replacement battery is built for Dell XPS 14 L421X Ultrabook Series laptops. It uses Li-polymer cells rated at 14.8V and 4662 mAh to restore reliable mobile power. The unit suits professionals and students who need dependable runtime for everyday work away from a desk. Buyers needing a battery for a different Dell model or voltage should verify compatibility first.

Thermals, noise and power draw

Li-polymer chemistry runs cool and silent during normal charging and discharge cycles. Integrated safety circuitry protects against over-charge, over-discharge, overheating and short-circuit events. The battery delivers stable voltage output without active cooling or audible noise. No external adapter or fan is required for operation.

Capacity and voltage match

The decisive specification is the 4662 mAh capacity at 14.8V, which must match the original battery exactly for correct function. Confirm your original part number — 04RXFK, 4RXFK, C1JKH or FFK56 — and voltage before ordering. A different capacity or voltage will prevent proper operation. Physical dimensions are 8.0x1.5x0.8 with a weight of 0.4.

Highlights

  • Li-polymer chemistry provides stable daily power
  • 8 V / 4662 mAh capacity matches original spec
  • OEM-grade cells extend usable runtime per charge
  • Built-in protection guards against over-charge and short-circuit
  • Fits Dell XPS 14 L421X Ultrabook series laptops

Specifications

BrandMicrosoft
ModelDell XPS 14 L421X Series
Part NumberDR-PRO-LDE321-A
TypeBattery
CompatibilityDell 421x-1046 / Dell XPS 14 (L421X) / Dell XPS 14 L421X Ultrabook / Dell XPS 14 LX421
Battery TypeLi-polymer
Battery Voltage14.8V
Battery Capacity4662 mAh
FunctionNotebook
Dimension8.0x1.5x0.8
Weight0.4

Questions about this item

How do I install the Dr. Battery 4RXFK in my Dell XPS 14 L421X, and what step is often missed?

Power off the laptop, remove the bottom case screws, disconnect the old battery connector before lifting it out, then connect the new 14.8V 4662 mAh pack and secure it; the step often missed is reconnecting the battery cable firmly before reassembling the chassis.

What maintenance or replacement will the Dr. Battery 4RXFK need later?

The Li-polymer 4662 mAh cell will gradually lose capacity over hundreds of charge cycles; when runtime drops below your needs, replace the entire battery pack — no user-serviceable parts inside.

What limit appears first during sustained use of the Dr. Battery 4RXFK?

Under continuous load the integrated protection circuit will trigger over-discharge or thermal cut-off once the 14.8V pack reaches its safety threshold, stopping output until the battery cools or is recharged.

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