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Small rectangular lithium-polymer battery with yellow and black wrap, 22.5 by 20.5 by 3.5 mm

Estry

Estry standard battery Garmin Vivoactive 3 361-00108-00 165mAh 3.7V

SKU CH-TCBX-3B248

Replacement lithium-polymer cell for Garmin Vivoactive 3 smartwatches, 165mAh capacity at 3.7V with overcharge and short-circuit protection

  • TypeRechargeable Batteries
  • Battery Capacity165mAh
  • Battery Voltage3.7
  • Direct replacement for Garmin Vivoactive 3
  • 165 mAh capacity restores original runtime
  • 7 V Li-Polymer cell matches factory voltage
  • Certified to ISO 9001, RoHS, CE, UN38.3
  • Compact 22.5 × 20.5 × 3.5 mm fits original compartment

Compatible replacement for Garmin Vivoactive 3

This 165mAh lithium-polymer cell matches the original 361-00108-00 specifications. It fits the Vivoactive 3 smartwatch and restores the factory runtime. The unit is new and certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards.

Steady output through a full day

The 3.7V chemistry delivers consistent voltage from the first notification to the last activity tracking session. Built-in protection guards against overcharge, over-discharge, over-voltage and short circuits. This prevents sudden shutdowns during GPS recording or heart-rate monitoring.

Slim profile with certified safety

At 22.5 x 20.5 x 3.5mm and 54.0g it slides into the existing compartment without modification. The 0.59Wh energy rating complies with transport regulations. RoHS approval confirms toxic-free materials for daily wear against the skin.

Highlights

  • Direct replacement for Garmin Vivoactive 3
  • 165 mAh capacity restores original runtime
  • 7 V Li-Polymer cell matches factory voltage
  • Certified to ISO 9001, RoHS, CE, UN38.3
  • Compact 22.5 × 20.5 × 3.5 mm fits original compartment

Specifications

BrandGarmin
TypeRechargeable Batteries
Battery Capacity165mAh
Battery Voltage3.7

Questions about this item

How much heat does the 3.7 V 165 mAh Li-Polymer cell generate during all-day use in the Vivoactive 3?

The cell is rated at 0.59 Wh with built-in over-voltage and short-circuit protection, so normal daily wear produces only minimal warmth inside the watch case.

What tools or adhesives must I already have to install this 22.5 × 20.5 × 3.5 mm replacement battery?

You will need a small Phillips or Torx driver set, a plastic pry tool, and a thin strip of double-sided adhesive tape sized for the 54.0 g pack.

Will the 361-00108-00 part work alongside the original charging cradle and firmware on my existing Vivoactive 3?

Yes, the pack matches the factory voltage and capacity specifications, so the stock cradle and watch firmware recognise it without any update.

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