I gave this a 4 out of 5 star ratting because all batteries have there down falls. But this battery operates amazingly, also is has some trouble in EXSTREAM cold, like at least below 20 degrees F... and in EXSTREAM heat like, 90-95 Degrees F..... the battery will drain quicker than usual. but in normal operating tepms like warm but not desert warm, it will use a full charge. When you buy the camera, always charge the battery FULLY before turning on your camera for the first time, also do this when buying an extra battery. Doing this will allows the batteries cells to fill up, buy this happening the battery has a "memory" and will always charge to that limit. If you don't charge the battery fully before using it, you could make it not charge to its fullest. And by this happening that might be the only amount it can charge to.
Thanks for reading my review. and i would recomend this to a friend, if they need an extra battery!!!!