<p>I have two batteries. One has completely failed whilst in the camera. One battery works completely fine, the other is completely dead, will not charge, will not reset. <br /><br />I've read about a fault with the 1DX, but that seems to be the camera, not the batteries which are affected. <br /><br />Any ideas any one please. Next point of call is Canon, but they are no great shakes where I am currently located.</p>