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Scientists Discover Way to Send Information into Black Holes Without Using Energy

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Scientists Create Battery-Free Wearable Technology That Monitors Your Heart in Real Time

In today’s fast-moving world, wearable health devices have become a part of everyday life. From counting steps to tracking heart rate and sleep, these gadgets help people stay aware of their health. But there’s one common problem—battery life. Most devices need frequent charging, which can interrupt continuous monitoring and reduce their usefulness.

Now, researchers from the National University of Singapore, University of Arizona, and Tsinghua University have introduced a breakthrough solution: a completely battery-free wearable system. This innovation could change how we track health—making it seamless, continuous, and far more convenient.

The Problem with Current Wearables

Modern fitness trackers and smartwatches are powerful, but they still rely on batteries. Whether it’s daily charging or once every few days, this requirement creates gaps in monitoring. For people who need constant health tracking—such as those with heart conditions—these interruptions can be risky.

Moreover, traditional devices can feel bulky or uncomfortable, especially when worn for long periods. This limits their ability to provide accurate, long-term health data.

A New Kind of Wearable: Skin-Like Sensors

The new system uses epidermal sensors—ultra-thin, flexible devices that stick directly onto the skin like a temporary tattoo. These sensors are lightweight, comfortable, and almost unnoticeable when worn.

They can measure important physiological signals such as:

  • Heart activity

  • Blood pressure

  • Physical movement

  • Other vital health indicators

Because they sit directly on the skin, they can capture highly accurate data compared to traditional wrist-based devices.

No Battery Needed: How It Works

What makes this system truly revolutionary is that it does not need a battery at all.

Instead, it uses a specially designed fabric called a metamaterial textile. This smart fabric is integrated into clothing and plays a key role in powering the sensors.

Here’s how the system works in simple terms:

  • A smartphone acts as the main hub

  • It wirelessly sends energy to the sensors

  • The sensors collect health data from the body

  • That data is then sent back to the smartphone

All of this happens without any wires or batteries.

Smart Design: Separate Channels for Power and Data

One of the biggest challenges in wireless systems is interference—when signals overlap and disrupt each other. The researchers solved this problem with a clever design.

Their system uses two different frequency channels:

  • 13.56 MHz for power transfer

  • 2.4 GHz for data communication

By separating these functions, the system ensures:

  • Stable power delivery

  • Fast and reliable data transmission

  • Minimal signal interference

This dual-channel approach is a key reason why the system performs so well.

Accurate Monitoring—Even During Exercise

In testing, the system showed impressive results. It was able to continuously and accurately measure systolic blood pressure, even when users were moving or exercising.

Systolic blood pressure is the pressure in your arteries when your heart beats. Monitoring it continuously can help detect serious health issues early, such as:

  • Hypertension

  • Heart disease

  • Risk of stroke

The ability to track this data during physical activity is especially important, as traditional devices often struggle in such conditions.

Why This Matters for Healthcare

This innovation could play a major role in the future of personalized healthcare.

Continuous monitoring allows doctors to:

  • Detect problems earlier

  • Understand patient health in real-time

  • Provide more accurate treatments

Instead of relying on occasional check-ups, healthcare could shift toward constant, real-world data tracking.

This is particularly useful for:

  • Elderly patients

  • People with chronic conditions

  • Athletes and fitness enthusiasts

From Devices to Smart Clothing

One of the most exciting possibilities is the integration of this technology into everyday clothing.

Imagine:

  • T-shirts that monitor your heart health

  • Sportswear that tracks performance in real-time

  • Sleepwear that analyzes your sleep patterns

All without charging or even noticing the technology is there.

This could make health monitoring effortless and automatic, blending seamlessly into daily life.

Future Possibilities

While the current system focuses on systolic blood pressure, researchers believe it can be expanded to monitor many more signals in the future.

Potential advancements include:

  • Tracking hydration levels

  • Monitoring stress and fatigue

  • Detecting early signs of illness

As the technology improves, it could lead to a new generation of invisible, always-on health systems.

Challenges Ahead

Despite its promise, the technology still needs further development before it becomes widely available.

Some challenges include:

  • Scaling production for commercial use

  • Ensuring durability in everyday clothing

  • Maintaining strong wireless connections in all environments

However, early results suggest that these challenges can be overcome with continued research.

A Glimpse into the Future

This battery-free wearable system represents more than just a technical achievement—it signals a shift in how we think about health monitoring.

Instead of devices that we occasionally check, the future may bring continuous, effortless health awareness powered by the clothes we wear and the phones we already carry.

If successfully developed and widely adopted, this innovation could:

  • Improve early diagnosis of diseases

  • Reduce hospital visits

  • Empower individuals to take control of their health

Conclusion

The collaboration between the National University of Singapore, University of Arizona, and Tsinghua University has opened the door to a new era of wearable technology.

By eliminating batteries and introducing smart textiles, researchers have created a system that is not only more convenient but also more powerful and reliable.

In the near future, staying healthy might not require any extra effort at all—because your clothes could be doing the work for you.

Reference: Kurt, S.A., Kasper, K.A., Xu, Q. et al. A battery-free wireless epidermal sensor network for continuous systolic blood pressure monitoring. Nat Electron (2026). https://doi.org/10.1038/s41928-026-01597-1

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