Build yourself a cool hybrid emergency light with Fan, which can be charged by both AC and Solar Energy. Get to know how this kit uses the solar energy efficiently in charging the battery
Emergency lights do not work long enough as their batteries are not charged fully due to the power cuts. During night the situation is even worse as it becomes impossible to sleep when the fan also stops working. Here is a circuit for solar-charged emergency light that can also be used to run a small DC fan. It can help in resolving the problem of uncharged batteries by providing dual charging option. Its battery gets charged by a solar panel during the day, but when it is cloudy, or at night, it can be charged using the mains power supply.