I got my new 2019 iMac set up today - my first 27" iMac after a few 21.5", don't know why I didn't get the larger one sooner! This is also my first time with a wireless keyboard (got the version with the number pad) and trackpad. Is it advisable to flip the power switches on the keyboard and trackpad off if I'm not going to use them for a while (however I want to define "a while")? Or won't it noticeably impact the battery life? They're on a keyboard shelf that slides under my desktop, so my cats aren't going to be accidentally stepping on them . . .