@SamYad
Thank you for posting on HP Support Community.
Don't worry as I'll be glad to help,
After reading your post, I did go through the Product specifications of your product and found that you have 3-cell, 52.5 Wh Li-ion installed on the PC.
Here is the part number: L08855-856 you can enter the part number in Google search bar in order to purchase one.
Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.
ECHO_LAKE
I am an HP Employee