So, it seems I (amateurlishly) replaced a Forerunner 245 battery : r/Garmin
Garmin Forerunner 55, GPS Running Watch with Daily Suggested Workouts, Up to 2 weeks of Battery Life, Black - Walmart.com
Amazon.com: Garmin Forerunner 55, GPS Running Watch with Daily Suggested Workouts, Up to 2 weeks of Battery Life, White : Electronics
Amazon.com: Garmin Forerunner 965 Advanced GPS Multisport Touchscreen Smartwatch, Black | Heart Rate Monitor, Training Stats, On-Device Workouts, Up to 13 Day Battery Life with Signature Series Gift Bundle : Electronics
Garmin's new Forerunner 255 doubles the battery life, adds tons of new features - PhoneArena
Garmin Forerunner 55, GPS Running Watch with Daily Suggested Workouts, — WE LOVE TEC
Garmin Forerunner® 245 Music | Running Watches
Amazon.com: Garmin Forerunner 265 Advanced Multisport Touchscreen Smartwatch, Black | Heart Rate Monitor, Training Stats, Daily Suggested Workouts, Up to 13 Day Battery Life with Signature Series Charging Bundle : Electronics
Refurbished/battery life : r/Garmin
Garmin Forerunner 955 Solar, GPS Running Smartwatch with Solar Charging Capabilities, Tailored to Triathletes, Long-Lasting Battery, Black with Wearable4U White EarBuds Bundle - Walmart.com
Forerunner 245/245 Music Owners Manual - Viewing the Body Battery Widget
Garmin Forerunner 245 Music, GPS Running Smartwatch with Music and Advanced Dynamics, Aqua Aqua Music GPS Smartwatch
Amazon.com: Garmin Forerunner 55, GPS Running Watch with Daily Suggested Workouts, Up to 2 weeks of Battery Life, Aqua (Renewed) One Size : Electronics
Garmin Forerunner 245 Review - All-Around Running Smartwatch – Ann Arbor Running Company
Garmin Forerunner 55, GPS Running Watch with Daily Suggested Workouts, — WE LOVE TEC
Best Garmin Deals: Save Up to $450 on Fenix 6X Pro, Forerunner 945, Strike 4 Fishfinder and More - CNET
Garmin Forerunner 245 Music Review: The Best Running Watch You Can Buy | Tom's Guide