I have been using this Anker brick and it definitely says "Charging rapidly"
http://www.amazon.com/Powerful-10000mAh-Anker-PowerCore-Technology/dp/B013HSQXZC
Is it this one by any chance?
http://www.amazon.com/Powerful-10000mAh-Anker-PowerCore-Technology/dp/B013HSQXZC