Dell has released two new laptops from the nascent ULV class. The 13z and 15z are members of the Inspiron series and cost $550 and $580 respectively. ULV stands for Ultra Low Voltage and refers to processors designed to work at lower voltages and use less power.

In the case of the new Dell laptops, that translates into respective battery lives of 11 hours (13z with a 13.3 inch monitor) and 10 hours (15z with 15.6 inch monitor).