Amazon.com: 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 : Electronics
Amazon.com: Replacement Battery for Garmin Forerunner 225, Forerunner 235, Forerunner 630 Part NO 361-00086-00 : Electronics