It’s simple really, the colder your engine is, the more power it takes to crank it as the oil thickens. So it takes more power to crank it, and often longer cranking times as well as the motor is more difficult to start when it’s colder. And the colder your battery is, the less power it can give. This is why batteries usually die when the weather turns cold. But did you know that a battery which seems useless when it’s cold can often work fine when it’s warm again? If you can’t afford to replace your battery, you might be able to wait it out, just be sure that if you run your battery down that you charge it again ASAP. The longer it sits discharged, the more damaged it becomes.