Cut off the light. The husband took a solar battery to charge phones and other electronic stuff, but the battery quickly gave the available energy, and from the darkness of the night refused to charge. Then the engineer pretended that a burning wax candle was also a photon transmitter. He placed the battery near the candle, covered the farm with foil so that the light would not run away, and sat next to this iconostasis waiting for the solar battery to be charged.
For the first time in my life, I saw a picture of how the technology is tried to charge with the force of fire.