First, if there's no electricity for a week or a month, I'll bet dollars to donuts the land line phones are out as well. That said, I easily have enough battery power for my HAM radios, especially if I'm running low wattage locally. Getting on the HF bands running morse code can be done at very low power as well, and requires very little time operating.

Don't get me wrong, I'm not saying my HAM radios can substitute for telephone, land or cell, in every case. All I'm saying is that I can spend $240 per year on things that will be better for me than a land line phone in addition to my cell.