Excess heat will have a significant effect on the life of your laptop battery. This results in increased heat which your standard fan setup may not be able to deal with effectively. When a laptop battery is on its way out, your machine will need to work harder to achieve the same results. Gradually this will diminish and you will need to replace it. When your laptop battery is new, it will be a full power and charging capacity. Your laptop battery will not have the same capacity to be fully charged as it did before.
Checking the Capacity of your Laptop Battery.
