3.7V 200mAh 602025 Lipo Battery Rechargeable Lithium Polymer Battery Pack with JST PH2.0mm Connector for Bluetooth Speaker, GPS, Smart Watch, Portable Devices

It looked like it was charging and then just stopped. Looking at maybe trying to replace the battery - https://www.amazon.com/Winfox-Rechargeable-Connector-Bluetooth-Portable/dp/B0GDQK4281/