Cadillac Celestiq key fob battery
1 of the 3 model years listed for the Cadillac Celestiq 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.
- 2024Unknown
Not confirmed yet
- 2025Remote key (manual does not split key types)
CR2450
Owner's manual: manualslib.com (checked Nov 1, 2026)
Manual text: “Replace with a CR2450 Lithium or equivalent battery.”
Find CR2450 on Amazon - 2026Unknown
Not confirmed yet
Changing the battery
Separate remote fob
- A separate fob has no key blade inside, so it opens with nothing but a coin or a small screwdriver.
- Turn it over: some older fobs use one small screw, newer ones just clip. Pry at the seam once any screw is out.
- Replace the cell, keeping the + side where it was, and check the small metal tab still touches it.
- Snap the case shut and watch for the lights to flash when you press lock at the car.
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.
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.