I switched from a Samsung galaxy note5 that was a really good phone until a few weeks after purchase it started having many problems especially with the battery. Everyday, something wrong would happen to the battery whether it was random power off or some apps draining in the background. On occasion random system services like LTE discovery or play store would drain my battery for no reason. I had enough of Samsung when the phone had a software update that failed to install properly resulting in the bricking of the phone. I had enough of Samsung so I switched to iPhone and got iPhone 6s Plus. 2 weeks in and I'm amazed that I've had zero battery issues so far. Everyday the battery is extremely consistent and there are never fluctuations or random drains. How is the battery management on iOS so stable compared to android Samsung? I love that I get consistent 7 hours sot every day.