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Small rectangular lithium battery, silver finish, 29.8 by 23.1 by 7.0mm

Estry

Estry WF-1000XM4 cell phone battery 500mAh 3.85V LP702428

SKU CH-54E4-RX3VH MPN WF-1000XM4

Lithium-ion replacement cell for the WF-1000XM4 charging case, 500 mAh at 3.85 V with overcharge and short-circuit protection

  • TypeBatteries
  • Battery Pack1-pack
  • Battery TypeLithium
  • Battery Capacity500mAh
  • Battery Voltage3.85
  • Replaces the original WF-1000XM4 charging-case cell exactly
  • 500mAh 3.85V lithium cell restores full case runtime
  • 8 x 23.1 x 7.0 mm fits the factory compartment
  • Overcharge, over-discharge, over-voltage and short-circuit protection built in
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards

Direct Replacement Battery

This 500mAh lithium cell matches the original LP702428 specifications for the WF-1000XM4 charging case. It delivers 3.85V and 1.93Wh in a 29.8 x 23.1 x 7.0mm form factor weighing 34.0g. The pack restores factory runtime for the case without modification.

Low Heat Operation

Normal charging and discharging produce minimal warmth thanks to the protection circuit that guards against overcharge, over-discharge, over-voltage and short circuits. The cell meets ISO9001, RoHS, CE, UN38.3 and MSDS certifications for safe, stable performance. No active cooling is required in the enclosed case.

Restores Original Case Life

This unit replaces a depleted or swollen LP702428 cell inside the WF-1000XM4 charging case. It is not compatible with the earbuds themselves or any other model. Buyers needing a higher capacity than 500mAh or a different voltage should look elsewhere.

Highlights

  • Replaces the original WF-1000XM4 charging-case cell exactly
  • 500mAh 3.85V lithium cell restores full case runtime
  • 8 x 23.1 x 7.0 mm fits the factory compartment
  • Overcharge, over-discharge, over-voltage and short-circuit protection built in
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards

Specifications

TypeBatteries
Battery Pack1-pack
Battery TypeLithium
Battery Capacity500mAh
Battery Voltage3.85

Questions about this item

How do I install the LP702428 battery into the WF-1000XM4 charging case and what step is often missed?

Open the case, disconnect the old cell, connect the new LP702428 matching the polarity, then reseal; the step often missed is verifying the connector clicks fully before closing the shell.

What maintenance or replacement will the 500mAh 3.85V cell need over time?

The lithium cell requires no scheduled maintenance; replacement is needed only when runtime drops below usable levels after many charge cycles.

What limit appears first during sustained use of the 1.93Wh battery?

The 500mAh capacity sets the runtime ceiling; under continuous drain the cell hits its discharge limit before thermal limits become a factor.

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