My bigger issue is that it is a 3100 mah battery, with the size and weight of a 3100 mah battery, but it only has an effective charging capacity of a little over 1500 mah. Thats a lot of weight and bulk to carry for that small of a "battery power".
A recent review of the 3100 mah s7 edge backpack, shows that only about half of the battery capacity is transferred to the phone. The rest is assumed to be lost in the wireless charging process. The note 7 backpack is listed on the samsung page as able to provide approx 50% recharge to the note 7 battery. That is unacceptable to me for the size and weight. So I am going to carry around a small battery pack (10,000 mah) with quick charge. I did this recently at Disney. Spending 14 hours in the park, playing with the phone standing in line, and using the disney app to keep track of reservations, etc, was murder on the battery. The little quick charge battery pack worked awesome . Sat at lunch and plugged it in to charge off the pack, and within an hour was basically fully charged, and ready to go again.
The rapid charging feature, is quietly one of the biggest game changers in terms over overall smartphone technology in the last few years. I would sacrifice nearly every other feature on a device, but not rapid/quick charge.