Laptops with the Longest Battery Life

We were already impressed by the fact that the Sony VAIO Pro 13 offers above-average endurance, thanks in no small part to its more power-efficient Haswell CPU. Alone, the notebook lasted a strong 7 hours and 20 minutes. However, attaching the $150 sheet battery doubled its lasting power to an awesome 14:38.
[Source: laptopmag]