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The Samsung Galaxy S7 Edge supports both Samsung's own Adaptive Fast Charging and Qualcomm Quick Charge 2.0.  You would need to use Samsung's own Adaptive Fast Charging Charger to support Samsung's 15 watts Adaptive Fast Charging scheme.

The Adaptive Fast Charging Charger provided to the Samsung Galaxy S7 Edge 11.6 watts (8.9 volts @ 1.3 amps) to rapidly charge for the first 45 minutes.  After that, the power dropped quickly down to 1.8 watts (8.9 volts @ .2 watts).

It took about 80 minutes to fully charge the Samsung Galaxy S7 Edge using Samsung's Adaptive Fast Charging Charger.