The battery performance differs as per the atmosphere and the temperature outside. If your battery is heated, let your battery cool itself before you start your engine. And when it is really very cold make sure your battery warms up. The standard temperature for both hot and cold temperatures should be room temperature to accurately measure your battery reading. With the best car battery testers you’ll easily be able to determine the health of a battery. You simply connect the clamps to the terminals and then check the reading. Check This Out https://theyoureviews.com/best-car-battery-testers-reviews/