I have just taken delivery of a Samsung Galaxy S7 Edge. This phone is a big step up from my Samsung Galaxy S3.
The biggest step up is the battery duration. Now my S3 had pretty good battery performance allowing me well over a day's use before a recharge is needed.
BUT. I charged my new S7 up on Saturday morning giving it 100% charge. I have since been to London and back, sat in a coffee shop twice using WIFI and taken some pictures whilst listening to a swing band and quaffing an ale.
The charge now at 20:51 on Monday night is 17%. If I enter 'Ultra Power Saving Mode' I'm informed the phone will last another 1.1 day.
Pretty impressive IMO.