XTPower® MP-10000 Power Bank - portable external USB Battery Charger with 10000mAh - 2 USB 5V 2.1A and 1x DC 9V / 12V + Car Charger Adapter (Electronics)
I was very skeptical of this power pack, but I'm an avid hiker with hiking Navi "Ibex 30" by Falk. Unfortunately, the battery is always about 2 hours empty. So I ordered my Powerpack and tried it out the same. The Navi was completely empty and I