My Battery Is draining fast. Help!!!?

Hey Everyone,

So I bought my macbook pro 13" 2013 (standard 750gb higher end model sold in stores) in April of this year. It's brand spanking new. The battery was awesome! I got a good 9 hours out of it while even working in photoshop and illustrator. I noticed slowly over time my battery started to drain quicker and quicker. When I first got it from 100% to 90% took 45min-1 hour. I thought that was great. Now my battery is draining literally by the minutes. When I look at the clock the battery precent ticks down. I've been to the apple store 7 times for this F@cking issue. It ****** me off that the idiots there don't know what the **** they are doing. If this was 5 years ago they'd hand me a new computer to keep me happy, now I just go in circles and circles. Anyways, I've wiped my computer (liked they recommended) and reintalled everything manually (Just incase if I did a time machine back up the original problem would get transfered on). That didn't work. Then they did a "stress test". I was told when I picked it up that it was being "repaired" and there was a problem with it. I thought ok great! It's gonna be fixed. But, when I came back to get it, I was told there wasn't an issue and it didn't get fixed that my battery was fine. They always checked the Activity monitor. A random program would pop up and show a high CPU and then dispear. This was their "conclusion", but they were WRONG. When I open activity monitor something pops up with high CPU and then dispears or returns to normal (Ex. 0.02%) instead of 95% or 75%. I thought let me quit and try again. I found everytime I quit and reopen it something else will pop up with high CPU never the same program always something different at a different precent. it will show up for a second then return to normal. This keeps happening when you repeatedly open it!!! So, that's not the problem.

As for programs. I am running Adobe CC, BUT adobe CC wasn't available back in March/April so that can't be the issue, even then I has CS5 suit and that's what I ran smoothly on my computer when I first got it. I transfered all my original music, movies, documents, and that's it. All the basics. I only downloaded Chrome, Firefox (After the fact I knew it was still draining) Blender(Not that i use it, ever, but want to learn) Finalcut Pro (Which is never opened) and that's it! So, I have no idea why it is draining!!!

When they do their ******** "Dianogstic" the battery comes back "normal" when obviously they see it's not normal. Wipe and reinstall won't work since I did that, I stressed it out and that didn't work,I've did a PRAM reset, and reset where the batery charges (Cntrl,Cmd, power), I've uninstalled any other 3rd party apps, I've booted in safemode to find problem. I have PC installed in bootcamp, but that was installed after the fact. I don't know what else it could be.

WHAT ELSE IS THE PROBLEM?????????? ANYONE KNOW????