I bought my first laptop in 1996. It was definitely much less efficient power wise than my ARM 15 inch Mac. It could barely last 2 hours on battery. My curre

I bought my first laptop in 1996. It was definitely much less efficient power wise than my ARM 15 inch Mac. It could barely last 2 hours on battery. My current laptop can easily last two workdays (16 hours) without being plugged in doing normal work.