Till now no any Disconnection problems are observed by me. But sometimes mobile/pc are not detecting it for the starting of 1-2 minutes.
Battery backup is awesome. With 2300 maH battery, i use it continously for almost 16-18 hours, then i put it on charging while sleeping at 10-11 pm with 20-30% available battery.
As there are 30 students in my class, when 10-15 students connect with it, speed gradually decrease. Here speed is not that much great. High Speed comes only nearby towns/markets of National Highway upto 20-25 mbps otnerwise you'll get maximum speed of 5-6 mbps.