New 3.7v 280mah 1.04wh Replacement Battery For Tomtom Spark 3 Gps Fitness Watch + Gift - Smart Accessories - AliExpress
For TomTom Spark Cardio + Music GPS Watch 3.7v 1.11Wh 300mAh Replacement Battery | eBay
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