Battery for Garmin Forerunner 45, 45S; Swim 2 361-00104-20 (50mAh, 3.8V) from CELLONIC

(12 reviews)
Article number: 942854

What our customers say

4.9 (12)

  • Andrea Italy

    Perfectly compatible with my Forerunner 45. Just replaced the battery, the first recharge lasted three days and even recorded a run. Let's see how the durability goes

    Verified purchase

  • Christopher United Kingdom

    Garmin Forerunner battery works well and seems to be of good quality.

    Verified purchase

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Fits 3 devices

100% compatible replacement for Garmin batteries

Specifically designed to fit your smartwatch. See the full compatibilities list.

Guaranteed 50mAh capacity

Unlike many competitors, our battery capacities are true, real and guaranteed. This Lithium-Polymer battery is 50mAh and offers long runtimes with fewer charging breaks - exactly as advertised.

High-performance 3.8V 361-00104-20 battery

Our long-life replacement smartwatch batteries deliver consistently high performance that matches or exceeds that of your fitness tracker’s original battery - all for a high number of charging cycles.

Superior quality and safety standards

Battery specialists since 2004, all our replacement batteries undergo strict, rigorous testing to fully comply with the highest EU standards and beyond - that’s why they come with a 3-year guarantee.

The sustainable choice

Replace the battery, not your watch. It’s the smarter, cheaper, eco-friendlier choice, saving you money while cutting your environmental footprint through recycling.

Choose CELLONIC and never compromise on quality. Order now!