Its impossible getting 1-2 days of usage unless you do not ever do anything on your phone.
I had 3 different separate Lumia 920s and I can attest to it that they do not last so long.
I uninstalled everything and just put on Whatsapp and it drains the battery like crazy. Microsoft's own Skype drains the battery like crazy on its own as well. Same goes to WeChat or any social application.
Social Applications -
I tested it again:
- Continuous usage of Whatsapp alone lasts me < 3 hours
- Continuous usage of WeChat alone lasts me < 2 hours
- Continuous usage of Skype alone lasts me < 3 hours
The stupid thing is that all these are supposed to be normal applications for a Smartphone yet the phone, well, can't use them well.
Playing Guns 4 Hire, Dredd vs Zombies or even Robotek and your drains like water. This is without any applications active.
I don't use the usb charger as it will charge very slowly. I use the normal AC powered charger.
Sad, guess all your phone battery doesn't last that long. Mine is better. Battery drains to 50% after browsing for 4 hours straight using 3G. I always on 3G and could last for a day.