For a fully charged battery rated at 600 CCA, which current should be used at an ambient temperature of 70 degrees for 15 seconds?

To determine the appropriate current to be used for a fully charged battery rated at 600 Cold Cranking Amps (CCA) at an ambient temperature of 70 degrees Fahrenheit for a duration of 15 seconds, it is important to understand the CCA rating itself. The CCA indicates the maximum amperage a battery can deliver at 0 degrees Fahrenheit for 30 seconds while maintaining a specific voltage ( typically 7.2 volts).

At 70 degrees Fahrenheit, a battery generally performs better than at lower temperatures, meaning that it can provide higher currents safely for short bursts. Since we're considering only a short period (15 seconds) at a comfortable temperature, a safe and effective approach is to utilize about 50% of its CCA rating for short bursts, especially within the 15-second time frame.

Calculating 50% of the battery’s 600 CCA gives us 300 amps. This value is a solid choice given the conditions and the need to avoid straining the battery beyond its safe limits. Using this current will ensure reliable power delivery without risking damage to the battery or the vehicle's electrical system.

Other values from the choices may exceed the safe discharge rate or deviate from the recommended practice of using approximately half of the