Problems with bluetooth keyboard/mouse

Im having problems with my macbooks connectivity to my apple wireless keyboard and a bluetooth logitech mouse.
Sometimes the keyboard will randomly disconnected (the pop up) when im still using it and also my logitech mouse will begin lagging - it doesnt move around smoothly. i have to switch off my mouse and on again so that it will be back to normal.


any reasons for this behaviour?

im sure its not the batteries as they are both good. this happens maybe every hour or so randomly while im using it (i know it automatically disconnects after a while of being idle, but happens when in use).