2011 Toyota Prius Owners Manual - Page 492

4 -3 . Do-it -yourse lf m a int e na nc e Ele c t ronic ke y bat t e r y Replace the battery with a new one if it is discharged. n You will need the following items: l Flathead screwdriver (To prevent damage to the key, cover the tip of the screwdriver with rag) l Small Phillips-head screwdriver l Lithium battery (CR1632) n Replacing the battery STEP 1 Take out the mechanical key. 4 STEP 2 Remove the cover. Maintenance and care STEP 3 Remove the depleted battery. Insert a new battery with the "+" terminal facing up. 469 PRIUS_U (OM47685U) DVD