It is not possible to delete stored results.

Yes, it is possible.

Yes, the meter will show “exp” inside the strip icon if the test strips is the use by date has elapsed. The use by date is printed on the label of the test strip container.

The Accu-Chek Active meter detects the color change in the test pad area. If the test pad is checked too early, the glucose reaction may not yet be finished. If it is done too late, the color may have already changed due to drying.

The stored values will be kept in the meter at all times: they cannot get lost when changing the battery. If the battery change is done according to the user instructions (empty battery stays in the meter until new battery is available to be inserted) the time and date settings remain stored in the meter as well.