TomTom on Twitter: "@MFergusonAuthor Hi, Watch batteries not holding charge can sometimes be caused by the operating software misreading the charge in the battery. Please apply the Factory Reset described in this
For TomTom Spark 3 Cardio GPS 260mAh 1S1P-PP332727AE Battery Replacement
Amazon.com: MPF Products 280mAh PP332727 Battery Replacement Compatible with Tomtom Spark 3 GPS Activity Tracker and Fitness Watch : Electronics
1S1P-PP332727AE For TomTom Spark 3 Cardio GPS Watch Acumulator 2-wire Plug 260mah Smartwatch Batteries Replacement Battery _ - AliExpress Mobile
New 3.7v 280mah 1.04wh Replacement Battery For Tomtom Spark 3 Gps Fitness Watch + Gift - Smart Accessories - AliExpress