On the HTC M7 running Sense 6, how much battery life will you get when using Extreme Power Saving mode? I do not know.
from what i tested, battery life in "Extreme Power Saving" mode is worse than normal power saver. i don't understand why, but this shouldn't be like this..
How do I run the battery testcontacted HTC Support and they told me to run a "Battery test" and to "wipe cache partition" from stock recovery. The battery test was ok and cleared cache, now waiting for the battery to drop to test it again..