If your charger is already dead and you need to keep the phone alive, there are several ways to try: - USB cable. Connected to a laptop, car charger, etc., the USB can also power your phone. - DC outlet. The regular power supply hooked by the relevant cables at the phone battery input can charge it. This method requires measuring equipment, constant attention and precise calculation of volts and amperes to come. - Power bank. The power banks can be of different construction and accumulate the energy from solar batteries or DC supply. - Solar-powered charger. However, it requires direct sunlight and a lot of hours to charge the battery. - Hand crank charger. This charger is completely independent on the electricity so that you need to power it by hand.