How can you charge an iphone with just a double a battery no charger etc?

How can you charge an iphone with just a double a battery no charger etc?

Charging a phone with only a single 1.5 volt cell is not possible.

You could use 2 to 4 AA cells,
but that would not charge the phone battery to a useful level;
the best you should expect from it is a few minutes of use,
which would serve in an emergency.

There are "emergency chargers" made for that exact purpose.