Cadillac Optiq key fob battery
1 of the 2 model years listed for the Cadillac Optiq have a proven battery. The most common answer is CR2450. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2025Smart key
CR2450
FCC ID YG0G20TB1Two sites agree: americankeysupply.com and bestkeysupply.com (checked Nov 1, 2026)
Find CR2450 on Amazon - 2026Smart key
Not confirmed yet
Changing the battery
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.
- Use the slot where the metal key sat. Twist, do not lever hard, and work along the seam until the halves separate.
- Before you take the old cell out, look at its face. Put the new cell in with the same side showing, and avoid touching both faces at once.
- Snap the halves back together, slide the metal key home, and press each button, then try the start button from the driver's seat.
Cadillac smart remotes commonly hide a key behind a side button. With it out, the case opens at the bottom slot.
A CR2450 is 24.5 mm across and 5.0 mm thick, much fatter than a CR2032. A thinner cell will rattle and lose contact, so buy the exact size.
Coin cells are a choking and burn hazard for children. Store the spares in their original pack, out of reach.