All laptops are designed to cool themselves during use and dispel excess heat. If you notice your laptop is hot to the touch, your battery is likely working too hard and unable to cool itself. Your battery is having to work harder to power applications. Often, an excessively hot laptop will also be noisy since the internal fans are working overtime to cool the gadget. This causes your computer to overheat, which can strain your computer. NOTE: Always unplug your laptop and stop use if the machine is overheating to avoid further damage.