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Small rectangular lithium-polymer battery pack with connector and included installation tools

MPF Products

MPF Products 46mAh Battery Replacement for Fitbit Inspire FB412 FB413

SKU CH-2VW2-W9CPJ

46mAh lithium-polymer replacement battery restores power to Fitbit Inspire and Inspire HR models FB412 and FB413 and includes installation tools

  • 46 mAh capacity restores original runtime for Fitbit Inspire and Inspire HR
  • 7 V lithium-polymer chemistry matches factory voltage specifications
  • Free installation tools included for immediate DIY replacement
  • Compatible with FB412 and FB413 model numbers
  • One-year replacement warranty protects your purchase

Compatible Fitbit Models

This replacement battery fits the Fitbit Inspire and Fitbit Inspire HR activity trackers. It matches the FB412 and FB413 model numbers listed by the manufacturer. The pack restores power to those specific wearable devices only. It is not for other Fitbit lines or smartwatch models.

Capacity and Runtime

The cell is a 3.7V lithium-polymer unit rated at 46mAh and .17Wh. It supplies the original energy budget for daily activity tracking and heart-rate monitoring. Heavy GPS sessions or continuous display use will drain the reserve faster. The pack cannot extend runtime beyond the factory specification.

Installation and Build Fit

The package includes free installation tools for opening the tracker case. No soldering equipment is required because the connector matches the original board layout. The slim polymer pouch fits the existing battery cavity without modification. Builders needing a higher-capacity cell or a different voltage must look elsewhere.

Highlights

  • 46 mAh capacity restores original runtime for Fitbit Inspire and Inspire HR
  • 7 V lithium-polymer chemistry matches factory voltage specifications
  • Free installation tools included for immediate DIY replacement
  • Compatible with FB412 and FB413 model numbers
  • One-year replacement warranty protects your purchase

Specifications

BrandMPF Products
SeriesFitbit Inspire
ModelFitbit Inspire, Fitbit Inspire HR, FB412, FB413.
Part NumberFB412, FB413

Questions about this item

Will this 46 mAh 3.7 V cell fit my existing Fitbit Inspire FB412 without modification?

Yes, it is built as a direct replacement for the Fitbit Inspire, Inspire HR, FB412 and FB413 models.

How can I confirm the battery is performing correctly once installed?

Charge the tracker fully, then monitor daily step and heart-rate tracking; consistent runtime matching the original experience shows the cell is working.

Does the package include the small screwdrivers and pry tools needed to open the tracker?

The listing states free installation tools are included, so the necessary openers and drivers come in the box.

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