[Marcella]

I have a solar panel and charger strong enough to recharge my many rechargeable batteries in a reasonable length of time and it’s strong enough to recharge my Kindle and cell phone (which won’t work if power is out). With power outages after a hurricane, I have two older phones that plug directly in the phone jack in the wall and they work. My power needs are met. Losing power won’t affect me very much except for air conditioning but I will have working fans.

If you are suggesting hospitals could have these light weight panels, they won’t have them.

[Yosemitest]

If the power goes down for more than 6 hours, most of those batteries backing up the power in those cell phone towers go dead, and that's IF they're fairly fresh.
Some have backup generators to power them and fuel such as LPG or diesel to run them for about 24 hours.
After than, even if your phones have power, they probably won;t get a connection.

I'm only suggesting those panels for individuals and if they're not shielded during the "blast"; if they're in use at that time, then they'll probably get "Fried" .