The dummy battery is not long enough to stay in place and make contact with the camera contacts. You have to physically hold it so that it turns on the camera, when you let go of the camera it turns off. Unfortunately, this product seems to have been released in a hurry and not well tested. Since Fuji batteries are mostly generic, I assume others will have the same problem. I am an x-pro2 user. I have to return it for something else as I had to tape it down to keep it in place and I didn't pay for that.
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