It should use all 110 volts coming out of the wall
It does already. What it doesn't is using all the amperes coming out of the wall.
Under Tim Cook it is doing nothing, and he could easily be replaced by a block of wood and you would see no impact on the company. Just what is he being paid for?
How can you be so decisive about Apple management? Even if I think Apple would do better with Jobs (for a number of reasons including an important one: staff dedication), Cook is in charge of more than 100 thousand people worldwide and the company did not fall apart, so far. Initially, he couldn't take the risk to largely innovate and (if that didn't work) being accused of breaking Jobs' work. Now the time has come to change and innovate, and that should come from someone else. After Jobs' death, Cook took over to ensure a smooth transition., and, business wise, he did a fair job. Cook will be replaced within a year or two ; that's just how it has to be.
Adding features does not necessarily increase functionality -- it just makes the manuals thicker.