Should be USB stick drives be hot to touch when idle?

I’m using Ubuntu 20.04 and it was my first main foray into Linux (I had 18.04 for one week prior to upgrading).

I connect two SanDisk USB stick drives to my Dell laptop but they are used infrequently, however they are always hot to touch when the laptop is on. Is that normal? If that is normal, will that level of heat degrade them in anyway?

Also, where there is heat there is power, so it will obviously be reducing battery life too. Is there anyway of ‘turning’ them off until I need them (without removing them, smart ars*s)?