Current smartphones consume significantly more battery power than the cell phones of the previous generation. On a busy day, the energy sometimes even discharges before the evening homecoming. As everyday life is not always close to a power outlet, alternative sources of energy such as a solar charger will come to the fore. How sensibly the innovative form of mobile phone chargers can be used should not, however, be seen as too illusory.
The most important fact to any solar charger is crucial: the small solar cell needs direct sunlight to save even battery power. Even if there is permanent sunshine, the charger must be exposed to light for 10 hours or more to fully charge a smartphone today. The short stop in the sidewalk café to put the device on the sunlit table, so brings at best a few percent. Those who expect this kind of performance will be disappointed by a solar charger. For a long stay in the sun or in the absence of other power sources, the solar cell for traveling is however a very good stopgap. As a high-performance option, solar chargers also exist in the form of backpacks with mounted solar cells. Although these are clearly more cumbersome and very obvious, but provide a multiple of energy.
Nevertheless, most chargers are anything but pointless. Many of these models have an internal memory that absorbs the charged energy and usually provides a “filling” of a modern smartphone. So it works like an extra battery charge throughout the day. Since most good quality solar chargers use different connectors such as Micro USB, USB and the ports of current cell phone manufacturers, the energy storage system also charges other devices. In addition to the smartphone, it is theoretically possible to charge tablets, readers, sat navs or even notebooks when the solar charger outputs the necessary voltage and is compatible.