I use this Amazon.com: Plugable USB 2.0 4 Port Hub and BC 1.1 Fast Charger with 2.5 Amp Power Adapter: Computers & Accessories

with this Amazon.com: TP-LINK IEEE 802.11n, IEEE 802.11g, IEEE 802.11b 150Mbps Wireless N Nano Router (TL-WR702N): Computers & Accessories

then i can charge tablet and phone at the same time as having my own router running. You need the simple adapter for Europe (two round plugs) but the flat prongs fit most of the world in the 220 and 110 environment. Small and all in all fits in a ziploc nicely.