Mybe your hp laptop battery is broken, you can buy a new hp laptop battery from the wholesaleers. This laptop accessories site is good. www.udtek.com.It's price is very cheap but qulity is great.
Contact HP ...they may still be under warranty... if not you will need to get a new one. Go someplace where they can test it for you. Any local store that does pc work should be able to help. But contact HP first..its the best thing to do then take it from there
1. Learn to Extend Your Laptop’s Battery Life Top 15 Ways to Extend Your Laptop’s Battery Life 2. Go HP store and get them checked