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I would try a known good battery. I had one go bad for my 5D after using it. I used it and then recharged it but nothing happened when I put it in the camera. It seemed to charge fine, the light blinked like it was supposed to, and then went solid. When I got around to using it again, nothing, notta, zip. I thought my camera was dead. I put another one in and it was fine. Put the bad one back in and nothing. So I put the bad one back on the charger and it blinked for a few seconds and went to a solid charged light but when you put it in the camera, nothing.