Anker® Astro E5 15000mAh Dual USB Port External Battery Power Bank battery charger for smartphones, Android Phones Tablets, iPad, iPhone, cell phone, PSP, GoPro, GPS [Power version with Samsung cell - strong but smart] - Black (Accessories) 5
Anker® Astro E5 15000mAh Dual USB Port External Battery Power Bank battery charger for smartphones, Android Phones Tablets, iPad, iPhone, cell phone, PSP, GoPro, GPS [Power version with Samsung cell - strong but smart] - Black (Accessories)
I am often from early morning until late at night on the road and have to use the tethering my phone. Since you need then 2-3 times the battery charges a day and does not stay long enough in a socket. The external battery I can rest assured that is not going to cut off from the outside world. With a 1A charger charges the battery 14-16 hours.