Honda Fit key fob battery
3 of the 13 model years listed for the Honda Fit have 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.
- 2007-2009Key-head remote
Not confirmed yet
- 2009-2013Smart key
Not confirmed yet
- 2010Key-head remote
CR1616
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Replacing the Transmitter Battery ... CR1616”
Find CR1616 on Amazon - 2011-2012Key-head remote
Not confirmed yet
- 2013Key-head remote
CR1616
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “Battery type: CR1616”
Find CR1616 on Amazon - 2015-2017Key-head remote
Not confirmed yet
- 2015-2017Smart key
Not confirmed yet
- 2018Key-head remote
CR1620
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “Master Keys with Remote Transmitter ... Battery type: CR1620”
Find CR1620 on Amazon - 2018Smart key
CR2032
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “Smart Entry Remote ... Battery type: CR2032”
Find CR2032 on Amazon - 2019-2020Key-head remote
Not confirmed yet
- 2019-2020Smart key
Not confirmed yet
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.
A CR1620 is 16 mm across and 2.0 mm thick. It is easy to confuse with the 20 mm CR20xx sizes, which will not fit.
Smart key (push-button start)
- Start by freeing the hidden metal key: there is a latch or slide on the case, and the blade comes out once it moves.
- The gap left by the metal key usually has a pry point. A slow twist with a thin flat tool (tape on the tip saves the plastic) opens the two halves.
- Note which side of the old coin cell faces up (usually the side with the writing), lift it out with a plastic tool, and press the new one in the same way.
- Snap the halves back together, slide the metal key home, and press each button, then try the start button from the driver's seat.
Honda smart keys typically have a release lever for the built-in key. Twist a coin or the key tip in the slot it exposes to split the case.
A CR2032 is 20 mm across and 3.2 mm thick. CR2032, CR2025 and CR2016 share the same width but not the same thickness, so a swap between them can leave a loose contact or a case that will not close.
Keep spare coin cells away from small children. A swallowed coin cell can burn the throat within hours; if it happens, go to an emergency room at once.