Your DSLR and a good amount of the equipment you use to shoot video will require some form of power. Drawing that power from batteries is the easiest way to do this as they are portable and require no cords or AC outlets.
Besides being sure that all of your batteries are fully charged before going on any shoots, you should also be sure you’re maximising the performance of what you’re working with. For an all-day shoot you’ll need multiple batteries. Read the manufacturer’s guidelines and work out how many you need—then take an extra, just in case.
A battery grip is an extension on your camera to add life-span to your working time. A battery grip will not only extend your run time, but also will alleviate having to change batteries often and have multiples as backups.
Devices like an external audio recorder will require AA batteries for power. Having a set of good rechargeable batteries will keep costs down. Just be sure that before your shoot your batteries are all fully charged.
A portable battery pack is an option a lot of people aren’t familiar with or don’t know much about. The versatility that comes with having voltage you can hold in your back pocket upstages conventional rechargeables, hands down. A pack like the Tekkeon will provide DC power and adapter tips. You can dial in the voltage output you desire and it will run LED lights, gadgets, laptops—you name it. This is an awesome power solution for those on-the-go shoots where you don’t want to plug into a wall or carry around buckets of batteries. Just be sure to verify that the gear you are powering is compatible with the battery pack.
AC power for the 5D or other cameras
An AC power adapter plugs into a wall socket and connects to a dummy battery pack that goes into the battery slot on your camera. If you need to power your camera for extended periods of time, this solution will enable you to do so without having to worry about a battery.
The Moviemaking With Your Camera Field Guide is Olivia Speranza’s guide that shows you how you can build on what you already know to create truly spectacular movies with your camera in whatever genre you choose. It introduces everything from the language of film and basic equipment you will need, to the art of post-production and publishing your new work.