Intocircuit power bank power bank Power Bank 11200mAh 5V 2A / 1A Dual USB Ports External Battery Charger (Grey) for: iPad mini, iPhone 5, iPhone 4S, iPad 2, iPod Touch, Samsung Galaxy S3 i9300 S2 (Electronics)
I have now tested the battery pack for four days while on a variety of devices. When fully charged, it can in an emergency two smartphones (Xperia Z) and a Kindle Paperwhite complete load and still has decent reserves in stock for a TomTom navigation