These days, we are highly dependent on our smartphones that cannot do anything without them. What if there is no power and your smartphone's battery dies? Of course, there are are power banks that can ...

Solar day lamps (SDL) are simple and cost-effective. A few examples of SDLs have been described in [1], [2] and [3]. An SDL without any energy storage element suffers from frequent changes in the ...

Solar lighting is one of the easiest ways to brighten up your outdoor spaces without worrying about wiring, power outlets, or high electricity bills. Whether you’re adding extra visibility to your ...