I have not been through IGI but make sure you have backup power for your electronics as not all airports have good access for Pax to charge things.
Despite you being on a budget, you might want to look at the possibility of a paid for transit lounge? This is the airport:
Delhi Airport - Official Airport Website for live flight information, flights booking, airport lounge & hotel bookings - IGI Airport, New Delhi, India and Lounges is on the main menu. Not least - they will have plenty of power sockets, Web access and so on. Other posters here might be able to help.