Extra batt ery use
Additional battery life may not seem worth spending more money on, as during long days of shooting you can just replace your camera batteries. There are, however, situations where having more battery life built-in is really handy. While shooting long events such as weddings, for example, you don’t want to waste time rifling through your camera bag for your spare battery. Battery grips are also useful when you’re shooting at night, especially for ultralong exposures, where a single battery could run out.