I have a 10" tablet. I can use that thing for hours and hours every day for a week without having to charge it. It's not a laptop, but it does have a nice bright 10" IPS screen (which is way better than that TN joke on my laptop). Both my laptops last about two hours or just enough to view a full movie on battery if I'm on a train or something like that. All the laptops seem to have real battery life of 2 (most common) to 4 hours (rare). I've read this Macbook thing has 10 hours, perhaps that's true and if it is then good for those who have one. Generally 2 hours of Screen On Time is very little. It's possible to leave your home without dragging a phone or tablet charger along but there's little to no point in bringing a laptop without the power brick. It's possible to do much, much better. A bigger battery would be a good start. You can detach the battery on some laptops (essential feature, btw). Both of my batteries are really small and light. It's no wonder they don't last that long. I'd personally take the weight and size of a real battery and have an actual mobile device. Current laptops are just "mobile" in the sense that you can move them from power outlet to power outlet.