The charging cable used with your power bank can make a big difference in the power banks performance.  It’s of no use have a power bank with 1000mAh output when the cable is only rated to 500mAh.  The cable is limiting the output power by 50%.

This image shows cable testing apparatus used by our factory to test every single cable and adapter before shipping to us.

We have thoroughly tested our cables can assist with the correct choice.  All our power banks are paired with cables that are of suitable power ratings for that particular power bank.