Tesla S Owner's Manual page 135

Battery - High Voltage
Type
Rating
Voltage and Polarity
Temperature Range
Specifications
Subsystems
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.
135