The small black power supply on the spinning bike is mainly used to power the Bluetooth module. Download the application from the smart phone and then connect with the spinning bike, so that more functions and data can be provided through the mobile phone application. There are generally two situations in which batteries are installed on spinning bikes. One is that a small battery is needed on the black and white dashboard to provide data such as speed, time, distance, energy consumption and heart rate test.
Functional characteristics
There are also some functions that support timing, and a spinning bike may not have a dashboard, but it needs batteries. Maybe it's the Bluetooth module on the spinning bike. You can download the application from your smartphone and then connect with the spinning bike, so that you can provide more functions and data through the mobile application. This is also a useful network link. This form is quite popular now, and it supports Bluetooth to connect spinning bikes.