I got on the bus today, and instead of setting my laptop on hibernate like I usually do, I decided to put it on standby instead. Since I've never really tested how much power standby mode drains compared to hibernation (zero minus the small amounts needed to maintain the clock etc), I initially wanted to check the power level after my 1hr bus trip.

I got off the bus and went to work afterwards and went to work, came home and what not.
9 hours later, I finally remembered to turn it on again to find a 10% decrease in battery charge.

It greatly exceeded my expectations, so it made me smile.