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Small rectangular lithium polymer battery pack with thin profile and connector ribbon

Cameron Sino 300mAh 3.7V battery for Garmin Forerunner 920XT PN 361-00078-00

SKU CH-Q7BZ-6E19B

Replacement lithium-polymer cell restores 300 mAh at 3.7 V for the Garmin Forerunner 920XT, matching original dimensions and protection circuitry

  • 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
  • Direct replacement for Garmin Forerunner 920XT
  • 300 mAh capacity restores original run time
  • 7 V lithium-polymer cell matches factory spec
  • 90 x 26.45 x 4.00 mm fits the watch cavity
  • ISO 9001, RoHS and CE certified for safety

Direct replacement for Garmin Forerunner 920XT

This lithium polymer cell matches the original 361-00078-00 part number and delivers 300mAh at 3.7V. It fits owners who need a fresh power source for the 920XT multisport watch. Buyers with a different Garmin model or a non-compatible part number should look elsewhere.

Fully decoded chip and protective packaging

The new fully decoded chip works like the original battery and includes overcharge, over-discharge, over-voltage and short-circuit protection. Shock-absorbing foam in the package guards the cell during transit. No tools, adhesives or extra software are supplied.

300mAh capacity for daily training use

At 300mAh and 1.11Wh the cell supports regular GPS sessions and smartwatch functions between charges. It will not extend runtime beyond the original specification and heavy ultra-distance use will still require mid-activity charging. Dimensions are 35.90 x 26.45 x 4.00mm and weight is 6.0g.

How it compares

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

Price $13.99
Pricier than about 63% 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

After how many charge cycles will the 300 mAh lithium-polymer cell typically need replacement?

The supplier notes a new battery reaches its best performance after 2 or 3 complete charge and discharge cycles; beyond that, lifespan depends on usage patterns and charging habits.

What is the first limit reached during continuous all-day operation of the 3.7 V pack?

The 1.11 Wh capacity sets the runtime ceiling; sustained GPS and sensor use will drain the 300 mAh cell before thermal or voltage limits become a factor.

How much heat does the 6.0 g battery generate when the watch runs 24 hours straight?

The slim 4.00 mm lithium-polymer pack produces minimal warmth during normal operation; the watch body acts as the primary heat spreader, so the cell itself stays close to skin temperature.

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