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Rectangular lithium battery pack labelled M3863A for Heartstart FR2 defibrillators

KingSener

KingSener M3863A 12V 4.2Ah 50.4Wh battery

SKU CH-0ZXR-DJTNZ MPN M3863A

12V 4.2Ah lithium battery powers Heartstart FR2, M3860A, M3861A and M3840A defibrillators with 50.4Wh capacity

  • Rated voltage12 V
  • Amperage4.2Ah 50.4WH
  • Reliable emergency power for Heartstart FR2 defibrillators
  • 12V 4.2Ah 50.4Wh capacity supports extended operation
  • Direct replacement for M3863A and M3863A-146144 part numbers
  • Compatible with M3860A M3861A and M3840A models
  • Manufactured by KingSener under strict industry standards

Medical-grade power source

The KingSener M3863A is a 12V 4.2Ah lithium battery built for Heartstart FR2 defibrillators. It supplies 50.4Wh of energy to keep the unit ready for emergency use. The cell is manufactured to strict safety standards for medical environments. It arrives new and ready for immediate installation.

Decisive compatibility

This battery fits Heartstart FR2 models M3860A, M3861A and M3840A, plus part numbers M3863A and M3863A-146144. It will not power other defibrillator families or generic 12V equipment. Buyers with different AED models must verify their exact part number before ordering.

Direct-replacement convenience

The pack matches the original form factor so it slides in without adapters or tools. No firmware updates or calibration steps are required after the swap. The single-unit pack keeps spare-parts inventory simple for facilities that maintain multiple FR2 devices.

How it compares

Measured against everything we stock in Disposable & Rechargeable Batteries, at today’s prices. Recalculated every night.

Price $124.99
Pricier than about 90% of the 985 comparable items (median $28.99).

Specifications

Product
Brand nameKingsener
Model nameM3863A
Part numberM3863A
Power
Rated voltage12 V
Amperage4.2Ah 50.4WH

Questions about this item

How long will the 50.4 Wh capacity keep a Heartstart FR2 running in standby?

The 12 V 4.2 Ah cell delivers 50.4 Wh, which the manufacturer states provides extended standby and operational periods for the defibrillator.

Does the M3863A use a proprietary connector or a standard terminal layout?

It is built as a direct replacement for part numbers M3863A and M3863A-146144, matching the original Heartstart FR2 interface exactly.

Will this battery fit inside the existing FR2 housing without modification?

Yes, it is precision-engineered for Heartstart FR2, M3860A, M3861A and M3840A models, allowing quick, direct installation.

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