I like to think most people are smart enough to realise that no matter how much energy a battery might hold, when you've used half of it, the battery will be ha

I like to think most people are smart enough to realise that no matter how much energy a battery might hold, when you've used half of it, the battery will be half empty. It's not like they're going to look at that tiny picture and think "well my gas tank never got half empty!"