In eight hours, I will have to make a vital call. Of course, you can buy an enhanced battery. Of course, you can also add external to the load. But, putting my hand on my heart, I confess: it is much cheaper for me to ask a passing person for a road than to perform shamanic rituals with my smartphone.

Of course, it is easier to transfer your problems to someone else. Stay with questions to the passers, rather than take measures so that the smartphone with the card does not discharge, or the external battery is unrealistic right off the road. Carrying your baggage with you in public transportation is expensive. Give up your car where you got, or paid parking is expensive.