17EnInsert batteries■For the SD-9, use one or two set(s) of four AA-type batteries.Use batteries of the same type and brand for a set.•Inserting the batteries■Slide the battery case whilepressing the lock release buttonsat the edge of the battery case.Install batteries according to theillustration inside the battery case.Insert battery from the – pole.•To remove a battery, push it from•the flip side of the battery case.Insert four or eight batteries.Insert the batteries of same type•and brand for the both A and Bsets.Push the battery case until itstops with a click.BA