http://engineering.mit.edu/ask/how-does-battery-work
http://electronics.howstuffworks.com/everyday-tech/battery5.htm
http://www.qrg.northwestern.edu/projects/vss/docs/power/2-how-do-batteries-work.html
http://www.rechargeablebatt.com/rechargeable-vs-nonrechargeable.html
https://docs.google.com/presentation/d/1URGGvyT3TvKsd1iRI60GCvDVnI9ObRsq5rDrFtJqjAA/edit?pli=1#slide=id.gb2799b6e2_0_111
http://www.wikihow.com/Create-a-Potato-Battery
http://schoolworkhelper.net/list-of-conductors-and-insulators/
http://www.nt.ntnu.no/users/fengliu/Photo123/Sony%20Tablet/Download/spr08_p49-52.pdf
http://electronics.howstuffworks.com/everyday-tech/battery5.htm
http://www.qrg.northwestern.edu/projects/vss/docs/power/2-how-do-batteries-work.html
http://www.rechargeablebatt.com/rechargeable-vs-nonrechargeable.html
https://docs.google.com/presentation/d/1URGGvyT3TvKsd1iRI60GCvDVnI9ObRsq5rDrFtJqjAA/edit?pli=1#slide=id.gb2799b6e2_0_111
http://www.wikihow.com/Create-a-Potato-Battery
http://schoolworkhelper.net/list-of-conductors-and-insulators/
http://www.nt.ntnu.no/users/fengliu/Photo123/Sony%20Tablet/Download/spr08_p49-52.pdf