Do you wait to charge your phones battery until it's close to dying? If you do- surprise! You're doing it wrong.

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Sources:
http://arstechnica.com/gadgets/2011/02/ask-ars-what-is-the-best-way-to-use-an-li-ion-battery/
http://www.techrepublic.com/blog/five-apps/five-tips-for-extending-lithium-ion-battery-life/
http://batteryuniversity.com/learn/article/discharge_methods
http://www.popularmechanics.com/technology/gadgets/a15731/best-way-to-keep-li-ion-batteries-charged/
https://web.archive.org/web/20090303131745/http://www.duracell.com/oem/rechargeable/Nickel/voltdep.asp
http://www.livescience.com/50657-how-batteries-work.html
http://batteryuniversity.com/learn/article/how_to_restore_nickel_based_batteries
http://batteryuniversity.com/learn/archive/will_the_reusable_alkaline_battery_have_a_future
http://www.qrg.northwestern.edu/projects/vss/docs/power/2-how-do-batteries-work.html
https://books.google.com/books?id=FVvo7W3Y7wgC&pg=PA38#v=onepage&q&f=false
http://batteryuniversity.com/learn/article/how_to_restore_nickel_based_batteries
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
http://www.howtogeek.com/179486/ask-htg-should-i-store-my-batteries-in-the-fridge/

Images:
https://commons.wikimedia.org/wiki/File%3ALeaking_Nopopo_battery_2nd_generation.JPG
https://commons.wikimedia.org/wiki/File%3AOpen_refrigerator_with_food_at_night.jpg
https://commons.wikimedia.org/wiki/File%3APanasonic%E3%83%96%E3%83%A9%E3%83%B3%E3%83%89%E3%81%AE%E3%82%AB%E3%83%89%E3%83%8B%E3%82%AB%E9%9B%BB%E6%B1%A0.jpg
https://commons.wikimedia.org/wiki/File%3AIphone_2.jpg