just inserted 2 new AA duracell alkaline batteries. The 2 year old Disto started to work; THEN after a few minutes it fails to respond; then the screen went blank.
This has happened before.
N.B.
Thee were 2 AA lithium batteries installed, and not used. when the unit was tested today, they were dead.
I am wondering if the malfunctioning is occurring, because the power is being drawn on, by the internal working