Is there a shortcut for activating Low Power Mode in iOS 9? I don't use my iPhone with a mobile data plan and I don't care if the polling frequency for background apps gets lowered a bit.

Is there an easier/faster way to activate the Low Power Mode than using Settings -> Battery -> Low Power Mode?

Is the Do Not Disturb mode that I can set using the quick settings, pulled up from the bottom of the screen, equivalent or is this a different thing? I saw some comparisons of Low Power Mode with Do Not Disturb mode in descriptions of the new feature.

Note: Using Siri is not an option for me due to privacy concerns.
Two Options:

Option 1:
Ask Siri to "enable low-power mode". This requires an Internet connection of some type because of Siri so if you are, in fact, using an iPhone without a data plan then you will need to be on wifi.

Option 2:
On iPhones featuring force-touch, you can force-touch the settings icon on the homescreen, navigate directly to battery and toggle low power mode there. Not much of a shortcut but it is something.