As a developer of Battery Super Saver we decided if it works on our developer sample. You may see the result in the short video attached below. What is important to highlight is a fact that 5.7" screen was all the time on with the medium brightness.
We reached 50% after 36 minutes and 100% after 1 hour 39 minutes.
which is amazing result if you have in mind such big screen and 3300 mAh battery. In comparizon Samsung Galaxy S6 Edge with 3000 mAh battery need 35 minutes to charge to 50% and 2 hours to charge to 100%.