Hello YoYoChuck.
Since your device is about 4 or more years old, I guess it is a problem of the battery system within it.
It is common problem for old rechargeable battery system devices.
You can change the battery by your own or ask local repair shop.
But instead of spending money for old devices, I think it is best to find some nice used Surface 5 or 6 in cheaper prices.
I hope it will help.