So, instead of carrying a battery pack, I carry around my flashlight and tap the power from it.
http://www.samsung.com/us/mobile/cell-phones-accessories/EP-SG900UWESTA
http://www.cnet.com/news/out-of-power-cable-lets-you-steal-juice-from-another-device/
http://www.dailynews724.com/technol...-steal-juice-from-another-device-h248794.html
http://www.samsung.com/us/mobile/cell-phones-accessories/EP-SG900UWESTA
http://www.cnet.com/news/out-of-power-cable-lets-you-steal-juice-from-another-device/
http://www.dailynews724.com/technol...-steal-juice-from-another-device-h248794.html