Lexus ES300h Owner's Manual page 75

NOTICE
Hybrid battery (traction battery) air intake vent
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Do not place objects that will block the air intake vent. The hybrid battery (traction
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battery) may overheat and be damaged.
Clean the air intake vent regularly to prevent the hybrid battery (traction battery)
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from overheating.
Do not get water or foreign materials in the air intake vent as this may cause a short
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circuit and damage the hybrid battery (traction battery).
Do not carry large amounts of water such as water cooler bottles in the vehicle. If
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water spills onto the hybrid battery (traction battery), the battery may be damaged.
Have the vehicle inspected by your Lexus dealer.
ES300h_OM_OM33B71U_(U)
1-2. Hybrid system
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