Hello Geoaddict,
Thank you for posting on the HP Forums!
I understand the battery will not charge to 100%. To start, please try Testing and Calibrating the Battery. You should be able to find out if the battery has any issues..
If the battery appears to be fine, you can try to improve your battery performance. For more information on improving battery performance, please review the following document: Improving Battery Performance (Windows 8, 7, Vista).
If none of this helps, you can try purchasing a replacement battery if the computer isn't in warranty. If it is, you should be able to get a replacement over HP phone support. You can utilize this website to learn how to contact HP appropriately, based on your region: Contact HP Worldwide
Please let me know if you have any other questions or concerns, and if this helped you. Thanks for choosing the HP Forums. Have a great day!
Mario