WASHINGTON — The Lenovo ThinkPad T430s topped TopTen USA's list for energy-efficiency.
The nonprofit group, appaluded he fact that the laptop uses only 7.4 kilowatt hours of electricity in a year of typical use. The average comparable model uses 28 kWh per year—almost 4 times the energy. On average, TopTen-listed laptops use about half (48%) the energy of comparable models.
