You could do like my mother-in-law. She turns off auto lock. Her iPhone never turns off, aside from when the battery dies, so she constantly charges it throughout the day. She complains about how crappy the iPhone battery is all the time, even though I've explained to her before exactly what the problem is and enabled auto lock. She just refuses to use it. She's deaf and therefore texts a ton. She switched from Blackberry a couple years ago and I think she left it on all the time too—but it's display was a lot smaller and since it's practically a dumb phone didn't use as much juice.