Running out of power at a shoot and having to wait for batteries to charge is a total pain, and extra stress you don't really want to be dealing with on top of everything else, so depending on what you're up to, you may want to take some additional batteries or a charger.

To find power options specific to the model of camera you have selected, just head to the Accessories tab on the package you picked, and you'll find everything that's compatible with your chosen camera.