Production of Portable Temporary Power Supply for Cellular Phone

Since most people nowadays use smart phones, they need a power bank as a backup power source. However, most of the mobile power supplies available in the market are heavy, making them inconvenient to carry. If we are traveling and have difficulty in obtaining power, it will come in handy when we need power temporarily. The motive of this article is that when we are out of the house and our cell phone is out of battery and we need power temporarily, we can charge it right away. The hardware is powered by two AA batteries through a voltage-boosting circuit to achieve the charging effect. We can also bring our own rechargeable battery to use as a charging battery. If the battery runs out, just go to a convenience store and buy a battery to keep charging our cell phone. Although the charging speed is not fast, it can reach the maintenance power for temporary emergency calls. Keywords: Cell phone, mobile power, charging