carfobbattery

Kia EV9 key fob battery

2 of the 3 model years listed for the Kia EV9 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.

  1. 2024Smart key

    CR2450

    FCC ID TQ8-FOB-4F81U44

    Two sites agree: americankeysupply.com and bestkeysupply.com (checked Nov 1, 2026)

    Find CR2450 on Amazon
  2. 2025Smart key

    Not confirmed yet

  3. 2026Smart key

    CR2450

    Owner's manual: ownersmanual.kia.com (checked Nov 1, 2026)

    Manual text: “Replace the old battery with a new CR2450.”

    Find CR2450 on Amazon

Changing the battery

Smart key (push-button start)

  1. Most push-button fobs hide a metal backup key. Press or slide its catch and draw the key out first.
  2. 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.
  3. 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.
  4. Close the case until it clicks all the way round, put the metal key back, then try the buttons and a push-button start.

Kia smart keys usually free the mechanical key with a button, and the case opens at the gap it leaves.

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.

Other Kia models