There’re roughly 3,000,000,000 phones on the planet which means there’re also 3,000,000,000 chargers. The average charger consumes 300mW on standby. You can do the math. The waste is tremendous. In addition, most mobile phones take only ~60 minutes to fully recharge these days. Yet most of us keep them plugged for hours… while resting at night.

Homegrown people planet profit – Raphael Grignani – Thoughts