Amazon.com | Digi4U Girls Backpack Middle School Students 。?THERE IS NO BATTERY BANK WITHIN THE PACKAGE. If you want to use the charging port, please buy a battery bank by yourself. ?SIZE-18.11\"(H) X 11.42\"(L) X6.3\"(W) / 46cm X 29cm X 16cm,weight 0.65kg. ?Material:Made of high qulity polyester,durable and water resistant. ?Feature:Unique and colorful design ,lovely Plush ball trinkets made this backpack more attractive.Large Capacity could fit for 16inch laptop. ?How to charge your phone? The backpack equipped with one cord,which connects your device on the outside to your own charging bank on the inside. ?Occasions: Suit for teenage girls to school, shopping, dating, travelling, camping, driving and etc. Can be used as school bags, everyday pack, casual rucksack. ?Recommended Age: 5-20 Years