 | 1. Using a thin blade screwdriver, remove the head with a wrench. |
 | 2. Press the tabs on both sides of the head and remove the head cover. |
 | 3. Use a screwdriver to press the lock (2) and remove the upper battery. |
| 4. Remove the contact plate, turning it so that the two cut edges located opposite the clamps and using a blade screwdriver, remove it from the head. See Fig. Location of the contact plate (1) before you remove it from the head. |
| 5. Remove the bottom of the battery. |
| 6. Install the battery in the bottom of the head so that the positive pole of the battery facing down. On the positive pole of the battery has a plus sign (+). |
| 7. Replace the battery contact plate and the positive pole of the upper battery down until it snaps into place. |
| 8. Replace the head cover until it snaps into place. |
| 9. Install the head of the key. |
When removing the battery, check the label of a battery polarity connection, otherwise put labels. 
