I'd hope it would be quite clear to this audience. Intensive tasks can eat far more than half your battery life. My MacBook Pro goes from 8+ hours of battery life to less than 2 if I run certain (not particularly fancy-looking) games, for example. The difference between idle consumption and maximum consumption is gigantic, which in turn implies that your battery life can be massively impacted by consistently going beyond idle.

Again, all true, but I don't understand why it's here.