Synergy Digital Smartwatch Battery, Compatible with Garmin Forerunner 645 Smartwatch, (Li-Pol, 3.7V, 180mAh) Ultra High Capacity, Replacement for Garmin 361-00072-10, 361-00086-00 Battery
Specifications:
Battery Chemstry: Li-Pol
Voltage: 3.7V
Capacity: 180mAh
Compatible with: Garmin 361-00072-10, 361-00086-00 Battery
Works for: Garmin Forerunner 645 Smartwatch and many more