Blue Tooth Mouse loses connection after some idle time

[JD]

  Is there a way to prevent linux from disconnecting from bluetooth 
mouse after some idle time?
System -> Preferences -> Bluetooth
System -> Preferences -> Mouse
have no settings for such behavior.
Also, System -> Preferences -> ScreenSaver  is not configured to 
hibernate or put anything to sleep after idle time.
Could this be a feature built-in to the blurtooth mouse itself?

The mouse is generic, unbranded, made in China.