I'm wondering if there's something on or running that shouldn't be. Do you keep NFC on (I know some Lumia's have had some issue with these)? I read/send about 5-10 emails, 20-30 texts (my friends prefer it over talking on the phone, I only prefer it when I'm in the office), games, pics, watching videos, and playing music (sometimes over bluetooth, sometimes with wired headphones). Oh, and calls (this is a phone after all). I do all of this and still get a good day to day and a half of battery life. Now that I'm settled in and the newness is wearing off, I'm seeing even BETTER battery life. Just conjecture on my part here, but doing so little on it shouldn't force you to charge by 2000, and I'm just wanting to help see if I can't fix it for you.
Some things I've found that help with battery life:
1) Turn off tap+send unless you use it. I have a few tags around, but don't use them. They're more for guests that come over and want to connect to my WiFi and the tags make it quick and easy in that they tap and they're on.
2) If you don't use XBox Music cloud, then go into phone settings->applications->music + videos, and turn off the top two options: connect with Xbox Music and Xbox Music cloud collection. Screenshot below:
View attachment 26777
Also, I've noticed that with most chargers with ANY phone, the GPS/maps apps will drain the battery while charging in the car (happened with all of my previous smartphones). I haven't found a fix, but I like what you're saying about that charger. Can I get a link to it? I kind of want one now.