This thing has to have a massively crappy battery life (in the real, real world)... Seriously, 800mah? The only reason that smartphones "work" is because they

This thing has to have a massively crappy battery life (in the real, real world)... Seriously, 800mah? The only reason that smartphones "work" is because they have big screens, while big screens obviously consume a lot of power and therefore require big batteries, there's more space for the battery inside as the PCB doesn't need to be big like the screen.