Minimum battery temperature for engine start is which temperature?

• A. -10°C
• B. -20°C
• C. 0°C
• D. -5°C

Answer: (A)

Starting an engine relies on the battery delivering enough cranking current. In cold weather, the battery’s capacity and the chemical reactions inside it slow down, so the available cranking amps drop as temperature falls. The specified minimum battery temperature for engine start is -10°C, meaning the battery must be at or above that temperature to start reliably. At -10°C or warmer, the starter can typically turn the engine over with the required power; below that, starting becomes unreliable and you’d need preheating or to postpone starting. The other temperatures are either warmer than the threshold (still acceptable) or colder than the threshold (not allowed without warming).