In the third year of the end times, energy has become an absolute luxury.
The power grid had completely collapsed two years ago. The high-voltage towers had rusted into skeletons, and the fuel tanks at gas stations had been emptied. Even the most primitive firewood was hard to find in the ruins of the abandoned neighborhoods in Detroit. Survivors had retreated to a near-primitive way of life – moving around by natural light during the day and huddling in drafty ruins at night. Even a single candle had become a family heirloom, for the combustible materials needed to keep the flame going were becoming increasingly scarce.
Ethan made a living in the settlement by repairing old things. His most precious possession was a nearly broken solar charger that could barely emit a faint light. But it had completely stopped working due to the continuous freezing rain. What worried him even more was that his sister, Leila, had a sudden high fever three days ago. In the post-apocalyptic world, there were no antipyretics. The only hope was to have a stable heat source to keep her warm and maintain her body temperature until the fever subsided. But the last bit of firewood in the settlement had been used up three days ago – even the last few scraps of paper used to start the fire had been burned by everyone.
The crowd was no longer as noisy as before. Everyone was pale and thin, with a solemn look on their faces. The third winter of the end of the world was more cruel than any previous year. Without energy to keep warm, people froze to death every night, let alone those with high fevers. Lila was curled up in a tattered quilt, her lips purple and her breathing weak. Ethan wrapped his own coat around her, but still couldn’t keep out the bone-chilling wind – without a stable heat source, she wouldn’t last long.
Old Tom, the leader of the settlement, squatted in the corner, smoking dried plant stalks. His face was as dark as a stone. “We’ve never had such a cold winter,” he muttered hoarsely. “No wood, no gasoline – not even anything to keep warm. God has forgotten this girl.” Just then, a low sob came from not far away. Neighbor Mara was holding her son Jack, who had long since passed away, her body shaking uncontrollably. The boy had also had a fever yesterday, and without any source of heat, he couldn’t survive the night. He was the third child to die in the settlement in three days. Jack’s body was already cold, his little hands stiff and purple – this slow and painful death was the fate that everyone here feared.
Ethan’s heart felt as if it were being tightly clutched by a hand. Looking at Lila’s faint breathing and then at Mara’s despair, tears splashed onto the cold concrete floor. Suddenly, he remembered something and jumped up abruptly, rushing into his small, dilapidated shed. He lifted the floor and revealed a rusty iron box. Inside the box were no gold or food – only a dozen or so intact lithium batteries and a small, temperature-controlled heater that he had spent a month modifying. These batteries were what he had hidden away before the end of the world. The heater and the oxygen generator were assembled from the spare parts he had collected by repairing old things. He had never dared to use them, always holding onto a glimmer of hope: one day, these batteries could power communication devices and help them find a more distant settlement with energy, leading everyone to a new hope.
Ethan quickly pulled out two lithium batteries and, with trembling hands, inserted them into the constant-temperature heater. With a faint hum, a weak but steady warmth gradually spread. This was his only hope, the only chance for Lila to survive – he was betting that these batteries would last until her fever broke, and that his modifications had not been in vain. The moment the warmth enveloped Lila, her shivering lessened, a faint but precious sign of life.
The people of the settlement swarmed around, hoping to warm themselves with the heat emanating from it, their eyes full of surprise and anticipation. Old Tom pushed his way through the crowd, staring at the heater that was giving off warmth, his voice trembling: “You… you actually have this thing? And working batteries?” Ethan nodded, his throat dry: “I never dared to use it, afraid it would run out before rescue came, but Lila can’t wait.” Just then, the heater paused, the warmth instantly fading a bit – the first battery was about to run out. Ethan’s heart sank. It seemed to be a poor-quality battery. He hurried back to the iron box to get a battery, only to find that there was only one left. The rest were empty batteries he had used to repair old things before.
The freezing rain had stopped, but the cold wind still pierced through the bones. Everyone’s hearts were in their throats. If the last battery ran out and Lila’s fever didn’t subside, there would be no hope. Mara wiped away her tears and covered Lila with the only relatively intact piece of cloth she had on her, whispering softly, “Hang in there, good girl.” Ethan clutched the last battery tightly, his palms sweating. He knew that this battery wasn’t just Lila’s life – it was the last glimmer of hope for the future of everyone in the settlement. Once it was used up, if anyone else fell ill, they would have no way to fight back. But the commotion still attracted others – two men from the settlement, Todd and Ray, stared fixedly at the heater, their eyes glinting with greed. “Give us the heater!” Todd stepped forward and roared, “My mom is freezing to death – she deserves to live more than your sister!”
Ethan immediately stood between Lila and the heater, his expression fierce. “Get away,” he growled, “This is for saving my sister. If you want warmth, figure it out yourself – don’t touch it.” Ray lunged forward, attempting to snatch the heater, but Ethan punched him back. “We’re all going to die here!” Ray shouted, blood trickling from the corner of his mouth. “Why should she live just because you’ve got a few batteries?” Old Tom stepped forward, raising his hands. “Enough! Ethan’s right – this heater is keeping that girl alive. If you want to touch it, you’ll have to get past me first.” The two men hesitated. Old Tom was in good shape, and Ethan’s desperate look made it clear he would do anything to protect Lila. They backed off, their eyes still glaring, but they didn’t leave – they were waiting, waiting for the batteries to run out, waiting for the heater to become useless, then they would seize the opportunity to take it. Meanwhile, in the corner, another survivor, an old woman, let out her last weak cough, her breathing completely stopping. The cold had finally claimed her life. Her death was slow and quiet, forming a stark contrast to the faint but growing warmth on Lila’s body.
Just as the heater was about to go out, Ethan gritted his teeth and inserted the last battery. Warmth was restored instantly. Lila’s eyelids quivered slightly and her lips moved. It felt like an eternity had passed before the first light of dawn appeared on the horizon. Lila’s fever finally broke and her breathing steadied. From her cracked lips, she softly called out, “Ethan.” There was no cheering in the settlement, only silent relief mixed with a bone-chilling sadness. Jack, Mara’s son, would never wake up again. His body was cold and stiff. Old Tom picked up the empty battery Ethan had replaced and ran his fingertips over its surface. His voice was heavy but resolute: “We all thought that in the end times, the most precious things were food and weapons, but today we’ve learned that it’s these insignificant little batteries.”
Ethan nodded, turned off the heater, and carefully took out the lithium battery that still had a little power left, wiping the dust off it. “Without electricity, we won’t survive the winter, and we won’t be able to save our loved ones,” his voice was not loud, but it was clear enough for everyone to hear. “Without batteries, even the most useful equipment is just scrap metal. The world’s energy has run out, but these small batteries are our courage to live on, more precious than gold. Yesterday, because we didn’t have any extra batteries, we lost little Jack; today, because of these batteries, Lila survived. This is their value – even in the most desperate moments, we dare not waste the hope they bring.” Todd and Ray lowered their heads, a hint of envy and resentment flashing in their eyes, as if thinking that if they had these batteries and equipment, their mother might not have died.
Night fell once again. Ethan placed the empty batteries and the one with remaining power back into the iron box and locked it tightly. Then he turned around and continued to study and assemble the solar-powered energy storage system. Outside the rusty wire fence, the cold wind howled, but inside the settlement, a few weak elders and children huddled beside the constant-temperature heater, the faint warmth dispelling the bone-chilling cold. This warmth was bestowed by the batteries – it was the hope that sustained them, the most precious glimmer in the post-apocalyptic world, a silent tribute to the departed. It was also a cruel reminder to all: in this world without energy, every lithium battery was a lifeline, an opportunity to survive the harsh winter, and a reason to keep fighting.
