TOYOTA 2010 Corolla - Manual (Page 353)

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4-3. Do-it-yourself maintenance
Key battery
Replace the battery with a new one if it is discharged.
■ You will need the following items:
● Flathead screwdriver (To prevent damage to the key, cover
the tip of the screwdriver with a rag.)
● Small Phillips-head screwdriver
● Lithium battery
Vehicles with smart key system: CR1632
Vehicles without smart key system: CR2025 (Type A)
CR2016 (Type B)
■ Replacing the battery (vehicles with smart key system)
Take out the mechanical key.
Remove the cover.
STEP 1
STEP 2