Review on Delapuy Waterproof Backpack Charging Flower1 Black by Nicole Houston

I give this backpack a 2. I like the design of the backpack but my only problem is the portable charger, it doesn't work as expected, I don't know what to do , it's wrong, it charges, but only when my cube and plug are plugged together, but when I take it out, it doesn't charge. Can anyone tell me if I need my own power bank as I feel it should come with a power bank and it doesn't and I am very disappointed in this part. Overall it's a good backpack but the charger doesn't work for me and that's just frustrating. Also, I looked at other people's reviews and they said it comes with a charging port and the 3 packed lunches didn't include any of that.