To be fair the rated battery life is generally under what the actual results are.Their saying 300 images, and 400 something. with the screen at half bright. I am not sure what my 5D mark 4 gets but I am guessing it is over a 1,000 images on one charge. Three to 400 images is ridiculous, of course there is the battery grip that holds two batteries for $350, also it doesn't have built in GPS. There is also the over heating problem which from the reviews is mostly for video, but they apparently have a fix, thy have made a lens adapter for the EF lenses that apparently cools down the senor, but then the camera is limited to EF lenses. It seems Canon rushed this camera. For me around a 1,000 images on a battery is good, maybe 800 would be acceptable. For a two to three hour shoot I usually take around 500 images and don't want to change the battery. Sometimes for wildlife photography I will take over 700 images, once in a while a 1,000. By the time the battery grip $350, 4 batteries $300, lens adapter $400 (I think) it will cost an additional $1,000.00 plus just to get the camera where it should have been out the door. Then if the shooter will be in a location where charging batteries is not possible there maybe many $100's more invested in batteries. Sony is looking better.