The phrase identifies a protecting accent designed to increase the operational lifespan of Apple’s top-tier smartphone by means of supplementary battery energy. It offers bodily safety whereas concurrently providing a way to replenish the machine’s battery with out requiring a direct connection to an influence outlet. A number of producers provide such equipment, various in capability, design, and extra options corresponding to wi-fi charging capabilities or ruggedized development.
These equipment handle the growing energy calls for of recent smartphones and the need for extended usability. Customers in professions requiring fixed connectivity, vacationers, and people relying closely on cell units can profit considerably. Traditionally, such energy options have advanced from cumbersome exterior batteries to extra built-in and aesthetically pleasing designs tailor-made particularly for flagship units.