Tesla S Owner's Manual page 129

Battery - High Voltage
Type
Rating
Voltage and Polarity
Temperature Range
Specifications
Specifications
Liquid-cooled lithium ion (Li-ion)
60 or 85 kWh (at beginning of life)
366V DC negative (-) ground
Do not expose Model S to ambient
temperatures above 60° C or below -30°
C for more than 24 hours at a time.
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