I recently noticed that my laptop was not charging and lost battery life quickly. I also noticed that there was a bulge in my case, creating cracks near the keys. This problem shows that there is gas buildup in the battery, and has multiple causes. In this case, I think it is due to overheating.

We must begin with turning off your computer through the operating system, and then disconnecting the charger. HP recommends this by removing the cord from the outlet, and then unplugging the cord from the cable. Disconnect all external devices (mouse, keyboard, speakers, etc.)