My laptop's battery lasts about 4.5 hours with regular usage. However, it is about 6 years old. I will readily admit that I'm on my second battery. It was pretty obvious when my first battery died. It would quickly go from 80% to 0% within only a few minutes. I then went onto Amazon, bought a replacement for 15 dollars, and changed it out in about 30 seconds. Anything less than this is frankly unacceptable to me. Others may feel differently, but it's 2015. Let's not pretend this is a problem that hasn't been solved, even if some companies are actively working against it.