At 0.45mm thick and weighing less than 1g, NGK Insulators' EnerCera battery is redefining what's possible in wearable device design. These ultra-thin, compact lithium-ion rechargeable batteries are specifically engineered for wearable applications across health monitoring, athletic performance tracking, beauty devices, and consumer wearables - delivering the ideal balance of power, safety, and user comfort that eliminates the traditional trade-offs between performance and wearability.
From a safety perspective, they are designed to prevent overheating, eliminate fire risk, and avoid ignition under normal and stressed operating conditions. This non-flammable, thermally stable performance is particularly vital for wearable devices that maintain close contact with users' skin.
Critically for wearable design, the batteries do not swell, eliminating risks of device malfunction or user harm. The batteries deliver exceptional reliability through minimal self-discharge rates for extended power retention, are highly resistant to float conditions, and remain rechargeable even in over-discharge conditions.
The semi-solid-state batteries feature proprietary crystal-oriented ceramic electrodes, distinguishing them from conventional Li-ion batteries. By utilizing active materials sintered as ceramics with minimal liquid electrolyte, the technology enhances both safety and reliability by eliminating organic binders.
Key Applications Driving Adoption
Sports: Smart Insoles
EnerCera's ultra-thin 0.45mm profile integrates seamlessly into smart insoles, enabling undetectable gait analysis and performance tracking. The battery withstands rigorous bending and compression stresses from athletic activity while maintaining reliable power delivery.
Beyond sports applications, EnerCera-powered smart insoles support healthcare monitoring for elderly users and early detection of neurological conditions like Parkinson's disease through continuous gait pattern analysis.
The battery withstands rigorous bending and compression stresses from athletic activity, with the EnerCera Pouch demonstrating over 10,000 combined longitudinal and lateral bend cycles at just 0.45mm thickness, while maintaining reliable power delivery.
Medical: Wearable Patch
EnerCera’s ultra-thin 0.45mm profile enables comfortable medical monitoring patches that patients can wear continuously without compromising comfort. This thin and flexible design allows the patch to conform closely to the skin, ensuring stable sensor contact and reliable data collection over extended periods of use.
Incontinuous glucose monitoring (CGM) applications, EnerCera’s long operational life supports long-term device usage, meeting eco-friendly goals. This enables patients to use a single device for prolonged monitoring periods, minimizing the frequency of replacements - particularly of batteries - and contributing to a substantial reduction in electronic waste.
Beauty: Wearable Devices
EnerCera delivers safe, reliable power for beauty devices used in sensitive areas, including around the eyes requiring maximum safety standard. The battery's non-flammable, thermally stable design eliminates heating risks during close skin contact, making it ideal for eye masks and facial beauty devices.
The ultra-thin profile enables sleek, comfortable beauty wearables that users can incorporate into daily routines without bulk or discomfort. EnerCera's lightweight design and swelling resistance ensure beauty devices maintain their elegant form factor while delivering consistent performance for skincare treatments and cosmetic applications.
NGK collaborates as a partner with various companies to develop superior wearable devices enabled by EnerCera technology.
About NGK Insulators' EnerCera Technology
