The Nikon D3500 DSLR is a good camera and the picture clicked from it have a great quality that you will rarely found in other camera of this range.it is user friendly because It comes with a user manual and by reading it you can easily set the lenses and click pictures. By buying this DSLR you get the best product in this range that is value of money. The shutter speed is from 30 second to 1/4000 is excepted but it varies depending upon exposure mode.Battery life of d3500 depends upon what you doing with camera i.e clicking photos or making videos. In photoshoot mode battery life is 2 to 3 hours and when you record video the battery life is 1 to 1.5 hours. The battery of this camera will be fully charge in 1.5 hours