How to Replace the Key Fob Battery in a Nissan Cube

1. Remove the screw from the keyfob.
2. Put a small screwdriver into the slit at the corner and twist to separate the upper and lower parts, protecting the casing with a cloth.
3. Replace the battery with a new CR1620 or equivalent.
4. Make sure the + side of the battery faces the bottom of the case.
5. Close the lid securely and install the screw.
6. Operate the buttons to check that the keyfob works.

• Do not touch the internal circuit or electric terminals, and hold the battery by its edges.
• For the Intelligent Key, remove the mechanical key, pry the case open the same way and use a CR2025 or equivalent battery.
• Keep children from swallowing the battery and removed parts.

Source: 2014 Nissan Cube owner's manual, PDF pages 286, 287. Steps are summarized in our own words (AI-assisted, checked against the cited pages 2026-10-18). Other model years can differ; your manual has the final word.