New iPhone SE battery draining fast
I just bought a brand new iPhone SE from Carphone Warehouse UK (boxed, sealed in original Apple box/packagine and shrink-wrapped. I even checked build date for phone and it was only built 8 weeks ago so I know it is brand new) and the battery isn't lasting long. I've done the usual: let phone battery die, then plug in and wait till it is 100% charged to calibrate it. With no bluetooth and hardly any use the battery dies of it's own accord after just 26 hours.
With my previous iPhone 5, under the same set of circumstances, it would take 64 to 72 hours to die. The main reason I bought a new iPhone SE was because my old iPhone 5 was three years old and the battery life was almost exhausted after being charged/discharged hundreds of times over three years, at the end the iPhone 5 battery was dying after about 34 hours.
How come a brand new iPhone SE battery is dying quicker than a well-used three year old iPhone 5?
I've only had it a few days, can I get my local Apple store to swap it for another, or will I have to go to Carphone Warehouse and get them to swap it?
Or, is there no fault at all and SE just has terrible battery life?