The battery lasts very well. In my S3 should I recharge every night, at the K zoom the battery lasts sometimes even a little longer. But usually I charge at night.
The operation is similar to my S3, only a few buttons have a different function. It is also used to it quickly. Here really bothers me is that I always get to the "My Magazine", because I was used previously always rumzuscrollen.
The camera is really great! The quality of the photos is super. They are crisp and the colors are great! There are plenty of camera modes, so you can find the right mode with security to every situation. I like best the Selfie mode (it will automatically be shot 3 consecutively). The pictures look a little out how prepared but not unnatural. The skin looks much more even than on normal images. It can be seen not stain or redness.
That I really like as a woman :-)
So, for those who like everything everywhere and take pictures, to have great memories of this Smartphone is perfect!