Received on time and well packaged, works very well mounted on the 5D does not heat. It's not Canon original brand or the large professional equipment, but it makes the same service for a lot less: this is still a power supply and I do not have intensive use, but needed to power the Liveview pictures studio or inside without emptying batteries.La quality is correct in respect of the price. As with any such product, whatever the brand, careful not to take the foot in taking the pictures.