$15.00 coupon is available. Just make sure you apply the coupon before you add it to your cart. The discount will be applied at checkout.
Looks like the coupon became available after highon2str found it but kudos to them for finding one of the biggest powerbanks I've seen!
I don't think you can take these on planes though.
ROMOSS 60000mAh Power Bank, 22.5W Max Portable Charger Phone Battery Charger with 4 Outputs and 3 Inputs Fast Charge External Battery Pack for iPhone, iPad and More (Fast Charging not Suitable for Samsung)