Jeez. Why do you think that ultra-durability is to make it easy to change the batteries? Ultra-durability is for the situations when I drop my phone by accident and instead of breaking it, it survives the drop.

And I don't understand certain folks' obsession with changeable batteries. You need to have those stupid opening compartment for batteries which always breaks down. I also remember that when my Blackberry used to hang, I would have no choice but to remove the batteries so that I can reset it. The on/off switch has always worked if my iPhone gets stuck up. Says a lot about how solid iOS is.