What is the best way to extend the battery life of a Nikon D7100 battery?

To extend the battery life of a Nikon D7100 battery, you can turn off features like image stabilization and auto-focus when not needed, lower the screen brightness, avoid using the flash excessively, and keep the camera in a cool environment when shooting. Additionally, using a genuine Nikon battery and avoiding frequent recharging can also help prolong battery life.