Electronic on the road, the one with the solar cells and battery solutions:
www.sistech.com
I guess when being abroad and needing solution for internet and backup of pictures etc, the following item can be quite interesting. Create your own local WIFI network with G4 or LAN cable. Including battery and USB-Drive:
https://www.kingston.com/en/wireless/wireless_readers/mlwg3
http://nerdtechy.com/kingston-mobilelite-wireless-pro-g3-review