Cell phone battery life ?

Since the day I got it, I have never turned off my phone. I use it as my alarm, as my business phone, and as my friend help hotline. I’ve only just gotten, had it for about half a year. I can get a new only once two years is up. I’m worried about one thing, the battery life. I am really in no mood to pay for a new battery a year into having a phone. Yes, the simple solution is to turn off my phone but let’s pretend that’s not an opinion. Is my LG phone battery really going to last two years under these conditions?