Two way radio battery

Imagine a situation wherein you are in the middle of an important conversation with your senior manager who is discussing the project details with you and explaining the criticalities of the project to be kept in mind when suddenly the battery of your radio is exhausted which leaves you in utter confusion and trouble as to how to proceed further. You very well know that your battery of the radio was charged early in the morning before coming to the office and again charging the same is utterly impossible. Besides this whole charging business will certainly waste your precious time which you otherwise could have invested in completing your project requirements efficiently.