Is it OK to keep it turned on all the hunt or should i turn it off after every find? i know it will use more battery power by keeping it on.One more thing while i was out this morning hunting i turn it on and after i found my coin it kept making a kind of vibrate sound i held it my hand to see if i had some metal around it,nothing there. i turned it off and then back on and so far it has not made that sound again.Thanks
TJ
TJ