Synergy Digital Smartwatch Battery, Works with Garmin Forerunner 225 Smartwatch, (Li-Pol, 3.7V, 180mAh) Ultra High Capacity, Compatible with Garmin 361-00072-10, 361-00086-00 Battery - Walmart.com
ZycBeautiful Original for Original GARMIN Forerunner 225 Smart Watch replace Battery 3.7V|Digital Batteries| - AliExpress