Toyota prius Owner's Manual page 454

4-3. Do-it-yourself maintenance
STEP 3
When installing, reverse the steps listed.
STEP 4
Use a CR1632 lithium battery

 Batteries can be purchased at any authorized Toyota dealer or repairer,
or another duly qualified and equipped professional, local electrical appli-
ance shops or camera stores.
Replace only with the same or equivalent type recommended by the

manufacturer.
 Dispose of used batteries according to local laws.
 If the electronic key battery is depleted
The following symptoms may occur:
 The smart entry & start system and wireless remote control will not func-
tion properly.
 The operational range will be reduced.
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Remove the depleted battery.
Insert a new battery with the
"+" terminal facing up.
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