INTELLIGENT DETERMINATION OF CHARGES REMAINING VIA A POWER BANK

A portable power bank and mobile computing device are described, where the mobile computing device includes a rechargeable battery that receives electric charge from the power bank via an electrical connection. Systems and methods facilitate determination of a “number of potential rechargings” of the mobile computing device battery via the power bank, e.g., how many times the power bank can charge the mobile computing device battery to a desired fuel gauge (e.g., 100%) before the power bank is depleted. The number of potential rechargings is determined based upon the desired fuel gauge of the mobile computing device, present fuel gauges of the mobile computing device and the power bank, and charging efficiency factors corresponding to the mobile computing device and the power bank, respectively.