Most of us have habit of keeping mobile for charging during while we are asleep. After 2 to 3 hours of charging, mobile battery is fully charged and for the rest part of night battery is getting overcharged.   I personally follow 1080 cycle i.e charge when battery is 10% left and disconnect charger when battery is 80% charged.  This cycle increase battery life.   Now coming to wastage of electricity by overcharging-  Study says approximately 4-5watts are consumed per hour during overcharge of battery for rest of night which is very very less on personal level or family.   Now Let's calculate -  4watts x 6hours of overcharge = 24 Watt-hours.  Consider mobile users in India are 800 million and only 10% people have this habit = 8 crores people x 24 watt-hour =19.2 lakh KWattHrs wasted every night. (huge na???)  Now this 1920 MWatt power is waste and Rs5 crore to create 1 MWatt power.  Which in turn approx Rs10k crore. Don't open your mouth just avoid overcharging to increase batt...
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