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Are You Out Of Power And Battery? Here’s What To Do To Charge Your Phone Safely During A Blackout

Written by Bruno Teles
Published on 12/07/2025 at 15:20
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From Power Banks to Car Chargers: Discover Tips and Tricks to Charge Your Phone Safely When the Power is Out, and Learn What You Should Never Do.

Is the power out at home and your phone’s battery is running low? In times of instability in power supply, being without communication can be a big problem. Luckily, there are practical and safe alternatives to avoid being left in the dark during a blackout.

According to news portals such as O Antagonista, which have addressed the issue, the concern over phone battery life during a power outage is a reality for millions of Brazilians. Below, we list the best and safest ways to charge your phone even when there are no outlets available.

1. The Power Bank: Your Best Friend in an Emergency

The most practical and safe solution is, without a doubt, the power bank. These portable batteries are designed precisely for this purpose.

  • How it works: You charge the power bank when there’s power and store it. When the power goes out, just connect your phone to it using a USB cable.
  • Capacity: Models with more than 5,000 mAh ensure at least one full charge for most smartphones. Those with 10,000 mAh or 20,000 mAh can offer multiple recharges.
  • Tip: Always keep a charged power bank at home for emergencies.

2. The Notebook: An Energy Source That’s Already at Home

Are you in the dark and out of battery? See what to do to charge your phone safely during a blackout

Your notebook or laptop, even when not plugged in, acts as a large power bank.

  • How it works: With the notebook turned on (using its battery), connect your phone to the USB port. The energy from the computer’s battery will transfer to your smartphone.
  • Attention: This method is slower and will consume your notebook’s battery, but it’s an excellent emergency solution to charge your phone and ensure communication.

3. The Car: Your Charging Station on Wheels

If you have a car in the garage, you have a powerful energy source at your disposal.

  • USB Ports: Most modern cars come equipped with USB ports in the dashboard, which can be used to charge your phone.
  • Car Adapter: If your car doesn’t have a USB port, you can use an adapter for the cigarette lighter.
  • Important: To use this option, the car must be turned on to avoid draining the vehicle’s battery.

4. Solar Chargers and Hand Cranks: Options for Adventure

Are you in the dark and out of battery? See what to do to charge your phone safely during a blackout

For more extreme situations, such as camping or very long blackouts, there are other alternatives.

  • Solar Charger: Small portable solar panels can charge your phone using sunlight.
  • Hand Crank Charger: Though rarer, these devices generate power by turning a crank. They are slow but ensure an emergency charge.

5. Tips to Conserve Battery Until Power Returns

If you don’t have any of the options above, the focus should be on making the battery last as long as possible.

  • Activate Power Saving Mode: This is the first and most important step.
  • Reduce Screen Brightness: The screen is one of the biggest energy consumers.
  • Turn Off Unused Features: Disable Wi-Fi, Bluetooth, and GPS.
  • Close Background Apps:
  • Avoid Games and Videos: These activities consume a lot of battery.

Caution! What NOT to Do to Charge Your Phone

In an emergency, avoid dangerous solutions.

  • Do Not Use Chargers or Cables of Doubtful Origin: They can damage your phone’s battery or, in serious cases, cause a short circuit.
  • Do Not Believe in Internet Myths: Videos that teach you to charge your phone using fruits, like lemons or potatoes, are false and do not work.

Have you ever experienced a blackout and had to use any of these tips? Share your experience in the comments!

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12/07/2025 15:26

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Bruno Teles

Falo sobre tecnologia, inovação, petróleo e gás. Atualizo diariamente sobre oportunidades no mercado brasileiro. Com mais de 7.000 artigos publicados nos sites CPG, Naval Porto Estaleiro, Mineração Brasil e Obras Construção Civil. Sugestão de pauta? Manda no brunotelesredator@gmail.com

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