Smartphones and other portable devices now occupy a central role in many of our lives. According to NPD's Mobile Phone Track, smartphones accounted for 59 percent of all handset sales to U.S. consumers in the third quarter of 2011. These devices can communicate wirelessly using cellular networks, Wi-Fi, or Bluetooth.
But ultimately, their hungry batteries must seek out the regenerative respite of a cord connected to a power source. Indeed, many consumers buy extra chargers to keep their...Full Story