Battery-free Regenerable Multimodal Sweat Sensing Device for Long-term Physiological Monitoring

Existing wearable health monitoring devices are limited by battery life, single detection index and poor stability, unable to support long-term continuous physiological monitoring. This paper designs a wireless, battery-free and in-situ regenerable multimodal sweat sensing system. The device relies on body heat and sweat biochemical energy for passive power supply, avoiding battery replacement and charging restrictions. It can continuously detect multiple physiological indicators such as blood glucose, electrolytes and inflammatory factors in sweat for up to 21 days, realizing long-term, stable and non-invasive human health dynamic monitoring.