A compact replacement watch battery for Garmin Fenix 3 series that restores essential runtime, Techtek Battery for Garmin Fenix 3. Keep a favourite training watch working reliably through runs and daily wear. Would replacing the battery be a sensible repair to extend the life of a Fenix 3?
⚡ At a Glance
- • Battery Chemistry: Li-Polymer type suited to compact rechargeable devices
- • Best for: Owners of Garmin Fenix 3 and Fenix 3 HR needing a direct replacement
- • Not ideal for: Watches outside the Fenix 3 family or users needing higher-capacity cells
A 3.7V, 300mAh Li-Polymer replacement identified as 361-00034-02 for Garmin Fenix 3 and Fenix 3 HR. Black finish and compact capacity make it suitable for straightforward battery swaps.
Reliable Power for Daily Use – with 3.7V Li-Polymer chemistry
Nominal voltage is 3.7V and the cell uses Li-Polymer construction, a common choice for small wearable batteries due to its compact form. The chemistry provides steady output appropriate for watch electronics.
Consistent voltage helps restore normal operation and display responsiveness after a replacement, keeping tracking and notifications functioning.
Compact Energy – thanks to 300mAh capacity
Rated at 300mAh, the cell stores a modest amount of charge in a small package suitable for the Fenix 3 battery compartment. Capacity reflects the energy available between charges.
Sufficient for typical daily activity tracking and notifications, making charging cycles manageable for regular use.
Straightforward Repair Fit – with replacement part 361-00034-02
Marked as a replacement for part number 361-00034-02 and listed as compatible with Garmin Fenix 3 and Fenix 3 HR. Labelling aligns with common aftermarket swap references.
Direct compatibility simplifies sourcing and fitting, so owners can restore a watch without needing an original-brand cell.
✨ The 4 Key Reasons for Techtek Battery for Garmin Fenix 3
- 3.7V nominal voltage – Restores the watch's expected electrical input for stable operation
- 300mAh capacity – Provides compact energy to support daily tracking and notifications
- Li-Polymer construction – Lightweight cell suited to confined watch battery compartments
- Replacement reference 361-00034-02 – Matches common replacement part for easier repairs
📋 Technical Details at a Glance
- Category: Electronics
- Brand: Techtek
- Product ID: B0921MB1Z6
- Replacement part number: 361-00034-02
- Voltage: 3.7V
❓ Frequently Asked Questions
Q: Is this battery compatible with Garmin Fenix 3 watches?
A: Yes. The listing identifies compatibility with Garmin Fenix 3 and Fenix 3 HR, and the replacement reference is 361-00034-02.
Q: What are the battery specifications I should expect?
A: The cell is specified as 3.7V, Li-Polymer type with a capacity of 300mAh and marked as replacement 361-00034-02.
Q: What colour is the battery and does that affect fit?
A: The product description lists the colour as black; colour does not affect electrical fit, which depends on the listed replacement reference and model compatibility.
🏆 Our Verdict
Ideal for owners of Garmin Fenix 3 and Fenix 3 HR who prefer repairing a trusted watch rather than replacing it. The key selling point is a compact 3.7V Li-Polymer cell, rated at 300mAh and labelled as replacement 361-00034-02 for direct swaps. Expect a practical, repair-focused solution that extends device life and offers lasting value through conservation of the original watch.
