Which Has More Energy, a Stick of Gum or iPhone 7 Plus' Battery?

For the energy content of a stick of gum we will go with Siri / Wolfram Alpha: 9.42 kCal.

What about iPhone 6s Plus' Battery?

To convert Wh to kCal, use this math:

    1 Wh = J/s h = J (3600 s) / s = 3600 J

And since a kCal = 4200 J,

    1 Wh = 3600/4200 kCal = 0.857 kCal.

Select the white text below for the answer.

iPhone 7 Plus battery = 11.1 Wh = 9.55 kCal. iPhone 6s Plus battery = 10.45 Wh = 8.96 kCal. So 7+ > stick of gum but 6s+ < stick of gum.