Amazon.com: Synergy Digital Smartwatch Battery, Works with Garmin Forerunner 235 Smartwatch, (Li-Pol, 3.7V, 180mAh) Ultra High Capacity, Compatible with Garmin 361-00072-10, 361-00086-00 Battery : Electronics
Replacement Lithium Polymer Li-Po Battery 190mAh Fit for Garmin Forerunner 225 235 620 625 735XT Smart Watches - Walmart.com