EDIT 2: They have a $2 coupon with no minimum spend making this even cheaper @ $42.45 Delivered
EDIT 1: If you use the mobile app, you get it for $33.54 USD = $44.10 posted
AUKEY is a respectable brand sold on Amazon with excellent reviews on a variety range of products.
aukey official store is a Top rated store on AliExpress with 26795 ratings
I found this 30000mAH Power Bank while searching on AliExpress for a high capacity battery. Bonus is that it is QC 3.0 and has both Lightning and MicroUSB inputs.
Micro USB Input: 5V 2.4
Lighting Input: 5V 2.4 A
Output 1 (QC 3.0):DC 5V-6.5V/3A, 6.5V-9V/2A, 9V-12V/1.5A
Output 2(AiPower):DC 5V 2.4 A
Don't forget 7.25% Cashback reducing this further to $41.74 Delivered .. Thanks SB