Canon BG-E7 Battery Grip
The Canon Battery Grip BG-E7 is an optional battery grip designed specifically for the Canon EOS 7D. It allows users to load a choice of one or two LP-E6 battery packs (not included). With two packs, the already impressive battery life is doubled, compared to using a single LP-E6 pack in-camera. This is especially useful when taking advantage of the camera's movie mode or Live View mode - operating modes that use more power.
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