sounds like your phone is broken -- i get 24 hours+ on a charge, and i use my phone throughout the day for surfing, facebook, a few calls, a few other apps, and plenty of texting. i consider that actually using it.
This...
I fail to understand what people are doing on their phones that kill them in a matter of 6 hours. My fully charged ip5s will last a long time. 100 texts, 20-30 minutes on FB, Some web browsing, several hours of streaming Spotify or I Heart Radio, a few calls and still have 50 percent by evening time.
If you game, all batteries are terrible, large or small.
If you stream video, results aren't much better.
S3, S4, Note 2, HTC ONE, Nexus 4, Nexus 5, none of these had near the battery efficiency that any of my iphones have had whether it be the ip 4,4s,5 or 5S.
Most of the iphone users that complain about battery life have never experienced what bad battery life actually means. There is no smartphone which sips power better than the iphone. I can go to sleep with it at a certain percentage, and wake up 7 hours later to find it may have dropped 1 percent. With Android, it was always a guessing game. What's eating my battery, why did I lose 30 percent overnight? With the iphone, the battery life is better, it charges in under an hour from empty to full which is a huge deal if you need a quick boost. Plug in an HTC ONE for 30 minutes and gain 5 percent battery, plug an iphone in for 30 minutes and you've gained 50 percent. The difference is night and day.
Most Android devices need twice the battery capacity of an iphone. An 1810 mAh battery along with power improvements in the new chip, will be more than enough battery for the ip6.