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Small rectangular lithium-polymer battery, silver finish, thin profile

Cameron Sino 300mAh 1.11Wh Battery Garmin Forerunner 920XT 361-00078-00

SKU CH-ZGG5-SGWKN

Replacement lithium-polymer cell delivers 300 mAh at 3.7 V for the Garmin Forerunner 920XT smartwatch

  • Battery pack size35.9 × 26.45 × 4
  • Battery typeLithium polymer
  • Battery capacity300 mAh
  • Battery voltage rating3.7 V
  • Details35.9 × 26.45 × 4
  • Product typeLithium polymer
  • 300mAh capacity restores full runtime for Garmin Forerunner 920XT
  • 7V lithium-polymer chemistry matches original power delivery
  • 90 x 26.45 x 4.00mm form factor fits the watch exactly
  • ISO9001, RoHS and CE certified for safety compliance
  • Fully decoded chip works identically to the factory battery

Direct Replacement

The Cameron Sino battery replaces the original Garmin 361-00078-00 cell in the Forerunner 920XT smartwatch. It is a lithium_polymer pack rated at 300mAh and 1.11Wh with a nominal voltage of 3.70 volts. The fully decoded chip communicates with the watch exactly as the factory unit does.

Low Self-Discharge Chemistry

Lithium_polymer construction keeps self-discharge minimal so the watch holds charge during daily wear and multi-day activities. The pack weighs 6.0 grams and measures 35.90 x 26.45 x 4.00 millimetres, matching the original footprint. Built-in protection guards against overcharge, over-discharge, over-voltage and short circuits.

Ready-to-Install Kit

The package includes shock-absorbing foam that protects the cell during transit and handling. Installation videos are widely available online, guiding users through the connector alignment step. A fresh cell reaches full capacity after two or three complete charge cycles.

How it compares

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

Price $11.99
Pricier than about 55% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameCameron Sino
Model nameForerunner 920XT
Part number361-00078-00
Product typeLithium polymer
Power
Battery typeLithium polymer
Battery capacity300 mAh
Battery voltage rating3.7 V
In the box
Battery pack size35.9 × 26.45 × 4

Questions about this item

How do I install the 300mAh lithium polymer battery in my Garmin Forerunner 920XT and what step is often missed?

Open the case, disconnect the old pack, connect the new 361-00078-00 connector firmly until it clicks, then reassemble; the step most people miss is fully seating the connector before closing the watch.

What maintenance will the 3.7V 1.11Wh replacement battery need over time?

No scheduled maintenance is required; after the first two or three full charge cycles the pack reaches its rated 300mAh capacity and the built-in protection circuit handles over-charge, over-discharge and short-circuit safety automatically.

What is the first limit I will hit when using the 35.90 x 26.45 x 4.00mm battery continuously?

The 300mAh capacity sets the runtime ceiling; under sustained GPS and heart-rate use the watch will drain the 1.11Wh pack in a single day before any thermal or voltage protection engages.

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