Negative Positive
Title: Batteries lose charge quickly - Grip causes issues as well.
Review: First and foremost, the batteries are junk. Original OEM Canon batteries will let me shot 5x to 10x longer than these. Even with a full charge. At one point, I had them charged in my bag, went to use them the next day, and got about 5 shots off before the battery died. Unacceptable. I ended up just throwing them away.Second, the grip itself. I have only had one chance to use it on a photoshoot, and after a few dozen shots, I was getting a low battery reading. I was using original Canon batteries. I pulled out one of the batteries, put it directly in the camera, and shot for the rest of the day on it.All and all, I am not the least be impressed with Opteka.Good luck.
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