This guide will tell you how to remove the battery. It is also the beginning step to most guides.
On the bottom of the camera, use your thumb to press the rubber battery cover towards the side of the camera with the strap base. The cover will shift to extend beyond the rest of the camera.
Hold the end of the battery cover that extends beyond the camera and lift it up.
Pull back on the orange tab to release the battery.
Pull the battery out.