Lexus 2008 IS250 Owner's Manual page 324

4-3. Do-it-yourself maintenance
If the electronic key battery is discharged
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The following symptoms may occur.
The smart access system with push-button start and wireless remote control will
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not function properly.
The operational range is reduced.
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Use a CR1632 lithium battery
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Batteries can be purchased at your Lexus dealer, jewelers, or camera stores.
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Replace only with the same or equivalent type recommended by a Lexus dealer.
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Dispose of used batteries according to the local laws.
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CAUTION
Removed battery and other parts
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Keep away from children.
These parts are small and if swallowed by a child they can cause choking.
NOTICE
For normal operation after replacing the battery
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Observe the following precautions to prevent accidents.
Always work with dry hands.
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Moisture may cause the battery to rust.
Do not touch or move any other components inside the remote control.
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Do not bend either of the battery terminals.
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