LG G2 (Verizon) Battery issue- hovering between 16 and 18% On charge?

I got my G2 at the beginning of Janurary and didn't have TOO many problems with it until recently. The battery life is going down faster than it should. Say, I go to work and have 100% battery-- by the end I'm lucky if I have 60%, and that's with 4 hours of work and only texting every once and a while and maybe going on Facebook in a 10 minute break. I'm really annoyed with this because i read everywhere about how great the G2 battery life was in comparison to the **** life I had on my old Iphone 4s.

Another issue is charging. I've been trying to charge my phone for THREE HOURS. It gets to 18%, then slowly drops back down to 16%. Then it crawls back up to 18%. Then back down to 16. I've tried resetting it, running safe mode, uninstalling apps I don't need/don't really use, and I have battery saver on. All I've used it for the past few hours was to text one person, nothing else. I'm not in safe mode right now and I only have messenger running but I'm not texting anymore. Also, the back of my phone is decently warm. Warmer than usual, but not hot.

My phone is plugged into the wall, using the cable that it came with.

I'm thinking about bringing it back to the store (it's under warranty) and seeing if the Verizon guys will trade my phone for one that is actually working.

Bring it back its defective

First let's try recalibrating the battery. So drain it all the way until it shuts off and them charge it back too full. That should recalibrate the lithium ion voltage sensor.

Once full, go to the battery usage app and see which apps and services are using the most battery. The biggest culprits for the Nexus 5 are google play services and google search. So if any of those are culprits, just turn off location services.

If the biggest drains are; screen and android system. That is normal, and if that is what draining your battery. It's probably a defective phone.