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Small rectangular lithium-polymer battery pack with attached connector and ribbon cable, plus tiny plastic opening tools

MPF Products

MPF Products 60mAh 3.7V LSSP281324AB Battery for Fitbit One FB103

SKU CH-C8XC-FG45Y

Replacement lithium-polymer pack restores power to Fitbit One trackers and includes installation tools

  • Specification3.7V 60mAh 0.22Wh Lithium-Polymer Rechargeable Battery Pack.
  • FeaturesIncludes Free Installation Tools.
  • Restores activity and sleep tracking for Fitbit One FB103
  • Direct replacement for LSSP281324AB part number
  • 7V 60mAh lithium-polymer cell delivers 0.22Wh capacity
  • Compatible with FB103, FB103BK and FB103BY variants
  • Installation tools included for straightforward battery swap

Replacement Battery for Fitbit One FB103

This 60mAh lithium-polymer pack replaces the original LSSP281324AB cell inside the Fitbit One activity and sleep tracker. It matches the 3.7V specification and 0.22Wh rating required by the FB103, FB103BK and FB103BY models. The pack arrives new and includes installation tools so you can swap the cell without sourcing extra equipment. It restores the tracker’s ability to hold a full day’s charge.

Thermal Behaviour and Power Draw

The single-cell polymer chemistry runs cool during normal tracking and sync cycles. No active cooling is required and the cell produces no audible noise. Current draw stays within the low milliampere range the tracker’s circuitry expects, so the replacement does not increase heat inside the band. The 0.22Wh capacity delivers the same runtime the original battery provided when new.

Fit and Installation in Your Tracker

The pack fits the existing battery cavity in the Fitbit One housing, using the same connector polarity as the LSSP281324AB part. Included tools let you open the case, disconnect the old cell and seat the new one without soldering. No firmware update or additional hardware is needed. Buyers who need a higher-capacity cell or a different voltage will not be served by this exact replacement.

Highlights

  • Restores activity and sleep tracking for Fitbit One FB103
  • Direct replacement for LSSP281324AB part number
  • 7V 60mAh lithium-polymer cell delivers 0.22Wh capacity
  • Compatible with FB103, FB103BK and FB103BY variants
  • Installation tools included for straightforward battery swap

Specifications

BrandMPF Products
ModelIntended for/Compatible with the Following Fitbit Tracker Models: Fitbit One (FB103), FB103BK, FB103BY.
Part NumberReplacement for the Following Battery Model/Part Numbers: LSSP281324AB.
Specification3.7V 60mAh 0.22Wh Lithium-Polymer Rechargeable Battery Pack.
FeaturesIncludes Free Installation Tools.

Questions about this item

How do I install this 60mAh 3.7V battery in my Fitbit One FB103 and which step do people often miss?

Open the tracker casing, disconnect the old LSSP281324AB pack, connect the new battery's wires to the same terminals, then reseal the housing; the step most people miss is folding the flex cable flat before snapping the clips shut so the case closes without pinching wires.

What maintenance or replacement will this lithium-polymer 0.22Wh pack need later?

Lithium-polymer cells degrade with charge cycles; expect to replace the battery again once runtime drops below a useful level, typically after several hundred full cycles, and store the tracker at roughly half charge if unused for weeks.

What limit appears first when this 60mAh cell runs under sustained use?

The 60mAh capacity is the limiting factor; continuous current draw from the tracker's sensors and display will deplete the 0.22Wh pack in a few days, so runtime ends before thermal or voltage-cutoff limits are reached.

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