Features Get high speed internet connectivity with secured access to any Wi-Fi device within 10 meters, Charge other devices too with its massive lithium ion 4400 mAh battery & connect up to 32 devices, at a single time!
Buy: Micromax Wireless Router with 4400mAh Power Bank MMX440W | More Routers & Modems
A typical 4400 mah power bank will costs you about 400 to 500 bucks so i think this is a best purchase with a wifi hotspot
now only 4g device advisable. this offer is very good but i prefer 4G device now only