How to Replace a Nissan Note e-POWER HE12 Key-Fob Battery

What you need

• CR2025 coin-cell battery
• Small flat plastic pry tool or protected flat screwdriver

Step by step

1. 1

   Verify the HE12 key

   Confirm the key is for the HE12 Note e-POWER covered by the linked exact-code reference.

2. 2

   Remove the mechanical key

   Release the emergency key from the fob so the case can be opened safely.

3. 3

   Separate the case

   Use the case seam/notch and gently work the halves apart. Do not twist hard enough to damage the shell.

4. 4

   Check polarity

   Observe the old battery orientation before removal.

5. 5

   Install the CR2025

   Seat the new CR2025 fully under the retaining contacts in the same orientation as the original.

6. 6

   Reassemble and test

   Close the case, reinstall the mechanical key and confirm the remote functions operate normally.