I hope you are right, but honestly, I can't believe the S6 will get close to 50% better battery life compared to the S5. I have never seen a next gen phone make that big of a jump in battery life, one year later.
And you're saying the S6 with it's 2600mAh battery, will get the same life like a S5 with an extended 4000mAh battery
The S5's with those huge extended batteries get some amazing battery life, top of the charts, way better than any iPhone 6 Plus or OnePlus One. I can't wait to see a comparison with a stock S6 vs. S5 with 4,000mAh extended battery, in a stamina endurance test.
I guess we'll know the answers next month, and I hope you are right, with the S6 having close to 50% better battery life than the S5, if true, I will get a S6 the first day.