there are lots of threads in this forum about issues with the SP3 battery. When did this start? Have you installed all available updates? Chances are your battery has gone bad and you need an out of warranty exchange. You can try to reimage from a downloadable recovery image https://www.microsoft.com/surface/en-us/support/warranty-service-and-recovery/downloadablerecoveryimage but I suspect the battery issue will still be present.
If you search this forum for
battery
you will find multiple threads about this