On Friday, the California Energy Commission issued new guidelines and set energy efficiency standards for battery chargers used to power cellphones, notebooks, power tools, and other devices. The commission hopes to reduce the total energy consumed by chargers, which are typically always left plugged in, even when a device is not being recharged, by 40 percent. Once fully implemented, the new standard could potentially reduce carbon emissions in the state by one million metric tons of carbon emissions and save California residents more than $300 million annually in e
