Hi,
Here’s a link to the [https://downloads.dell.com/manuals/all-products/esuprt_laptop/esuprt_inspiron_laptop/inspiron-17-n7010_service%20manual_en-us.pdf|service manual] for your laptop.
In it you will find the necessary pre-requisite steps and then the procedure to remove/replace the coin cell battery. (just click on the coin cell battery link in the Contents section of the manual).