AT&T is marketing the ZERO charger, a device that detects when a phone is no longer connected to it, and withdraws consumption of energy from its outlet accordingly.

Chargers for electronic devices consume energy when plugged in to an outlet even when not actively powering anything – estimates of the amount of energy wasted in America alone approach enough to power 24,000 homes each year. In response, AT&T is marketing the ZERO charger, a device that detects when a phone is no longer connected to it, and withdraws consumption of energy from the outlet accordingly. In addition to the reduction of this ‘vampire energy,' the charger is being developed as a standard across AT&T mobile devices to eventually decrease the number of outdated chargers discarded each year.

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