Amazon has the Tiergrade 22000mAh Power Bank Kit for $36 - $11 off with coupon POWER22K = $25 with free shipping on $35+ or with Prime. List price: $80. Comes with a 2-port wall charger and two micro USB cables, provides almost 8 times for iPhone 7, over 5 times for iPhone 7 plus, iPhone 6s up to 9 times, a Galaxy S7 up to 5 times, an iPad Mini about 3 times.
Has excellent Amazon Reviews.
Walmart has the OtterBox Commuter Series iPhone 7 Plus Case (Aqua Mint or Black) for $18 with free in-store pickup or $5.99 shipping to home. List price: $50. Features sleek profile easily slips into pockets and purses, soft inner and hard outer layers absorb and deflect impacts, block out dust, dirt and pocket lint.