1. Extreme heat : Heat is a very dreaded enemy of any modern battery like the Lithium Ion battery. Heat distrupts the chemistry of the battery and declines the lifespan. To solve this, make sure your PC's cooling system is very much functional. Clear dust from the cooling fan or heat sink, add cooling paste when it has dried out, replace the fan if its speed(rpm) has reduced so that excess heat will be expelled easily. While using your laptop, try to place it on an inclined stand or a thick book since you won't always go around with a stand. This is very advisable especially when charging it because more heat is expelled during charging. Most of the heat comes from the processor (CPU). The base of the laptop near the screen will be above on the stand or book and the palm rest will be inclined downward. This will make the air vent under the chassis free from any surface and there will be free outflow of heat. Related: How To Monitor Your Laptop Battery Health 2 .