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
Garmin Forerunner 235 Review | Tested by GearLab
Replacement Lithium Polymer Li-Po Battery 190mAh Fit for Garmin Forerunner 225 235 620 625 735XT Smart Watches - Walmart.com
UGB 3.8V 180mAh Smart Watch Battery 361-00086-00 For GARMIN Forerunner 220 225 230 235 620 630 735XT - Laptop Battery, Charger and AC Adapter | Ultra Green Battery