Hello, I am working on my project, where I need my arduino pro mini last very long on batteries. I have got powerbanks, I thought it is best source of energy for my arduino. But the powerbanks just turn off after one minute of powering arduino. So I thought i could buy step-up converter, that can convert 0,9 - 5 v to 5v. I could power the arduino with only one AA battery. Now I am worried, that the converter will consume the most of the energy.
Can anybody recommend me sollution please?