Amazon.com: FitBit Surge Smartwatch Battery (Li-Pol, 3.7V, 100mAh) Replacement for Fitbit Surge Smartwatch Battery : Health & Household
Lssp031420ab Battery for Fitbit Charge HR Smartwatch Rechargeable Batteries Pack Replacement New Li Po 70mAh Smartband Bateria|Replacement Batteries| - AliExpress
New Replacement 40mAh 0.15Wh Battery for Fitbit Alta HR Fitness Activity Tracker Alta HR Battery + Gift|Smart Accessories| - AliExpress
New 70mAh 0.26Wh Replacement Battery for Fitbit Charge HR Smart Fitness Watch | eBay
Alta Battery Symbol & Charging Issue - Fitbit Community