[https://www.youtube.com/watch?v=UKv5v24athY]
When you open the bottom, you will see a small silver circle. Remove it and leave it out for 20 or 30 minutes and then put it back. Make sure the laptop isnt plugged in and the battery is also unplugged for this process.
After that time, put the silver battery back, plug the main battery back in and then try. If it doesnt work, try again and make sure everything is unplugged.
Hope this helps! If it did please hit the accept answer button!