Abstract: The use of flying machines powered by the sun is even mentioned in Indian Vedic literature. In the twentyfirst century, we have come a long way in developing solar cells, which are the devices that will power our future by converting the sun's energy into electricity. This project is about using non-conventional energy, such as solar energy, to charge mobile batteries. Solar chargers are simple, portable, and ready-to-use devices that anyone, especially in remote areas, can use. Solar panels do not provide regulated voltage, which batteries require for charging. To achieve the desired constant voltage, an external adjustable voltage regulator is used. Because it is impossible to charge mobile batteries everywhere at all times, we designed this mobile charger to charge mobile batteries anytime, anywhere. In this paper, we use the concept of energy harvesting to charge batteries using solar energy. We can use it to charge our mobile batteries in remote areas where there is no electricity. The cost of this circuitry can be reduced to a point where the average person can afford it and benefit from it. As nonrenewable energy sources deplete on the planet, renewable energy sources must be incorporated for daily needs. Mobile phones have become such an important part of daily life that they must be charged at all times. This paper proposes a system for charging mobile phones that is powered by solar energy.

Keywords: Renewable energy, solar energy, mobile phones, battery, low voltage devices, Power Electronics, Energy Crisis, Power Failure, Solar Charger, Comparator.