Lenovo has released 14-inch L412 and 15-inch L512 L series ThinkPad notebooks, both models have a U.S. military-level impact resistance and resistance to moisture capacity. Lenovo Thinkpad L412 and Lenovo Thinkpad L512 equip with 6-cell battery, life time of up to 8 hours or so, the respective weights are 5.1 pounds and 5.7 pounds.