A battery and a solar cell can help you camp self-sufficiently. A battery can be used to store electricity generated by the solar cell and can then be used to charge electronics such as lamps, cell phones or laptops while camping. In this way, you can do without electricity from the socket and use clean, renewable energy sources instead. However, it is important to note that the power of a solar cell and the capacity of a battery are limited and you may not be able to power all of your electrical devices with it. It is also important to charge the battery regularly and make sure it is in good condition to ensure reliable power supply while camping.