Honda CR-Z key fob battery
Every model year listed for the Honda CR-Z has a proven battery. The most common answer is CR1616. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2011-2015Key-head remote
CR1616
Two sites agree: uhs-hardware.com and locksmithkeyless.com (checked Nov 2, 2026)
Find CR1616 on Amazon
Changing the battery
Key with remote in the head
- The remote electronics sit in the plastic head of the key itself, so there is no separate fob to open.
- Find the seam around the head. Twist a coin or small flat screwdriver in the notch at the blade end or side until the halves part.
- Inside you may find a small circuit board in a tray. Lift the board out if the cell is underneath, swap the cell with the same side up, and refit the board.
- Press the head together until it clicks and test the buttons. The transponder chip that lets the car start is separate from the battery, so starting should not change.
A CR1616 is 16 mm across and 1.6 mm thick. It is easy to confuse with the 20 mm CR20xx sizes, which will not fit.
If a child might have swallowed a coin cell, treat it as an emergency and get to a hospital right away.