Mine is like 10 months old and battery is awful, i know it depents on how you use it and what you use but all the reviews make battery life a con and not a pro. When i go to uni i don't use whatsapp too much, just check twitter sometimes and facebook, listen to music almost 4HS, half when i'm going and half when i'm going back and it lasts like 9 hours and i get home with 30% let's say. When i was using my RAZR i i was able to use WhatsApp like no matter, gaming, twitter, facebook and all those almost 4HS of music and the when i got back home i was with 40 to 50%, same happening with my other phone that it is a Optimus G, it doesn't drain like 920 with the same kind of use.
Well i deviated from the main topic here, 920 needs a successor, wireless charging would be great, like i said matte finish and i didn't search on this but if it's not possible i'd like for Windows Phone (now that it has a file manager with 8.1) to make wireless connection like Airdroid on Android.