7 Facts You Didn’t Know About Power Banks. Every week we receive tons of questions about Power Banks; how they work or how you can use them in the most beneficial way.So, with the help of our CTO Matti Naskali, we wanted to make this special blog post explaining 7 facts about Power Banks that you might not have known about. Matti is the ex-Nokia’ s J apan Head Engineer and has more than 30 ...