Powerbanks - A powerbank is like a portable battery where you can easily and smoothly charge your devices using a connected cable. With By Billgren's powerbanks, you can charge your mobile and headphones wherever you are! You can choose between a black or white stylish color and connect your powerbank to iPhone or Android. By Billgren's powerbanks have a capacity of 5000 mAh, which means that you can charge your mobile up to 2 times before the powerbank needs to be recharged again.