10 Apps That Kill Smartphone Batteries (all running in the background)

My friend and I were talking to each other about apps that would kill smartphone batteries in less than six hours if left running in the background.  We were thinking up of just apps on any platform, not iOS or Android exclusive ones.  All of this was just mere speculation - I don't know how badly these apps actually drain smart devices' batteries in general.  (I mean, I didn't have performance tests and that whatnot.)  Also not every person with a smartphone would likely have all the all apps mentioned below or even use them at the same time.

(*If you really want to be technical, you'd have to let the smartphone get updates while the phone is asleep for the battery drainage to be dramatic, such as pinging for e-mail updates every 10 minutes.)

Without further ado, I present to you: 10 Smartphone Apps That Kill Battery Life

1)  Facebook

2)  Twitter

3)  Tumblr

4)  Pinterest

5)  Vine

6)  Snapchat

7)  Instagram

8)  YouTube

9)  E-mail (any type)

10)  Camera

Honorable mentions:  Weather (any), such as The Weather Channel

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Image credits:
Facebook - http://upload.wikimedia.org/wikipedia/commons/0/06/Facebook.svg
Twitter - http://upload.wikimedia.org/wikipedia/en/9/9f/Twitter_bird_logo_2012.svg
Tumblr - http://upload.wikimedia.org/wikipedia/commons/2/2c/Tumblr_Logo.svg
Pinterest - http://upload.wikimedia.org/wikipedia/commons/3/35/Pinterest_Logo.svg
Vine - http://upload.wikimedia.org/wikipedia/commons/1/17/Vine_logo_green.png
Snapchat - http://en.wikipedia.org/wiki/File:Snapchat_logo.png
Instagram - http://upload.wikimedia.org/wikipedia/en/2/28/Instagram_logo.png
YouTube - http://upload.wikimedia.org/wikipedia/commons/0/06/YouTube_logo_2013.svg
iOS Mail icon - http://www.iphonehacks.com/2013/10/tips-mail-iphone-ipad.html
iOS Camera icon - http://tripletsisters.wordpress.com/2014/03/02/ios-7-icons-in-pixelmator/
The Weather Channel icon - https://play.google.com/store/apps/details?id=com.weather.Weather