First off, the amount of energy used by your cell phone is going to depend on a) which model phone it is, and b) what exactly you're doing on your phone. For argument's sake, let's assume that you have a non-energy-efficient phone, and that you run the battery down all the way every day.
According to a study by the Lawrence Berkeley National Laboratories, an average cell phone CHARGER uses:
3.68 watts while charging
2.24 watts while plugged to your phone but not charging (battery full)
0.26 watts when plugged into the wall but not your phone
If you plug your phone in before you go to bed, it will typically take about three hours to fully charge. The remaining five hours (while you're asleep) it will continue to drain energy. So 3x3.68=11.04, and 5x2.24=11.2. Total of 22.24 watts per day, IF you're a tree hugger and unplug your charger like you should. If you happen to leave your charger constantly plugged in, your daily use will be an additional 4.16 watts.
Read more: http://greenanswers.com/q/192679/products-shopping/electronics/how-much-energy-day-does-cell-phone-use#ixzz1Qnn9dK8T
Pictures and videos to be uploaded soon! 18 blocks of Pico Blvd in Los Angeles centered on Robertson was the event location! Planted trees, mint, thyme, rosemary, cleaned up sidewalks, painted curbs and meters, and created a positive atmosphere for growth and relationships to be built!
http://www.facebook.com/album.php?aid=2629722&id=923936&fbid=948490784710 for pics