Power Theory® 10000mAh Dual USB Power Bank External Battery Charger Portable Power Bank Mobile very compact for Apple iPhone 6, 6 plus, 5, 5s, 5c, 4, 4S, iPad Air, iPad Mini, Samsung Galaxy S5, S4, S3, tablet, smartphone, GoPro (White) (Electronics)
* * * Preliminary remark If I'm honest: Charging via USB is for me partly a closed book. I specially bought myself a small USB-meter for voltage and current, to find out why the store sometimes "back takes a little longer". As the main culp