TP-Link does have a smaller, cheaper ($12 vs $200) router that uses less than 2W power..
I love those
little blue travel routers! (I assume that's what you're talking about) I use them all the time to troubleshoot WiFi issues, or to turn wired-only devices into wireless clients. They're perfect for that. My favorite part is that they can be run off powered USB ports (they use a standard micro USB cable), so sometimes I can power the router off the device I'm trying to connect to the wireless network. Too cool.