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
300mAh Battery For TOMTOM Spark 3 / For TomTom Spark Cardio + Music GPS Watch | eBay
Rechargeable Battery 300mAh for TomTom Spark 3 TomTom Spark Cardio+ Music Watch | eBay