Make sure that you dispose of old batteries in an environmentally friendly way. Seek advice from your local authority regarding recycling.
If the range of the transmitter in the key decreases gradually, the battery (type 3V CR 2032) should be replaced.
Carefully separate the transmitter unit from the key using a flat object (e.g. a screwdriver) at the recess on the back.
Carefully prise out the battery with the flat object. Fit the new battery between the contacts with the + sign facing downwards. Reassemble the transmitter unit in reverse order.
Open the transmitter unit by separating the retaining clips on the sides with the flat object.
Carefully prise out the battery with the flat object. Fit the new battery between the contacts with the + sign facing downwards. Reassemble the transmitter unit in reverse order.