Introduction
Engineers, are you struggling with a power supply solution for your smart Bluetooth thermometer (especially a barbecue probe)? While the target market is Europe, the new EU battery regulations are a daunting challenge: Lithium titanate (LTO) batteries face high certification costs and a long cycle time, and their cycle life (approximately 1,000 cycles) is still insufficient for the intended “durable” product. Not to mention the logistics challenges posed by their hazardous material status.
Bluetooth Thermometer – Supercapacitor Solution
-Root Cause Technical Analysis-
Root Cause Technical Analysis
Let’s delve deeper into the underlying logic. The pain point stems from the “original sin” of chemical batteries:
Regulatory Definition: The new EU regulations target “batteries,” meaning devices that generate electrical energy through chemical energy. Any device using a chemical system cannot escape their regulatory net.
Chemical degradation: The lifespan of LTO batteries is limited by electrochemical side reactions such as volume changes during lithium-ion insertion/deinsertion and the continuous growth of the SEI film. This is inherent to the material and fundamental improvements are difficult to achieve.
Energy carrier risks: Lithium-based chemical systems inherently carry the potential for thermal runaway, which is the fundamental reason they are classified as hazardous goods under international transportation regulations.
- YMIN Solutions and Process Advantages -
YMIN’s answer is to replace them with supercapacitors that physically store energy. Our SLX and SDS series are not ordinary capacitors, but lithium-ion capacitors, combining high energy density with an extremely long lifespan.
Technical Breakthrough 1: Regulatory Classification. Their operating principle is physical ion adsorption/desorption, not chemical reaction, so they are classified as “capacitors” under regulations, effectively circumventing EU 2023/1542.
Technical Breakthrough 2: Lifespan Mechanism. The charge and discharge process does not involve phase change, minimally impacting the electrode material structure. This results in a cycle life of over 500,000 cycles, 500 times that of LTO.
Technical Breakthrough 3: Power Characteristics and Fast Charging. Their extremely low internal resistance (ESR) enables high-current charging in seconds and can easily handle the instantaneous pulse currents generated when Bluetooth modules transmit data, minimizing voltage drops and ensuring a more stable system.
Design Convenience: We offer models with the same dimensions as mainstream LTO batteries (e.g., Ø4mm), eliminating the need for engineers to redesign hardware and enabling true “drop-in replacement.”
- Data Verification -
Talk is worthless; data speaks for itself. We’ve verified this in actual customer products:
Lifespan testing: Using a simulated barbecue probe plugged and unplugged 10 times daily (10 charge and discharge cycles), using YMIN SDS series supercapacitors, after two years of continuous operation (well beyond the one-year warranty), the capacity retention rate remained above 80%, and the internal resistance increase was kept within 1.1 times.
Pulse Performance: During MCU startup and Bluetooth transmission, the original LTO solution experienced a significant voltage drop. However, the YMIN capacitor solution reduced voltage fluctuations by 40%, ensuring communication link reliability.
Extreme Temperature Testing: Under 2-hour charge-discharge cycles at 100°C, the capacity change was less than -4% after eight cycles, demonstrating excellent high-temperature resistance and making it ideal for kitchen appliance environments.
The following is a data chart after simulating the test of extreme usage scenarios: charge and discharge at 100℃ for 2 hours, a total of 8 cycles, the capacity change rate is less than -4%, and the internal resistance change rate is within 1.1 times.
Recommended Models -
This solution is not only suitable for Bluetooth thermometers but can also be widely expanded to energy storage applications for micro-devices such as wireless sensor networks (WSNs), electronic tags, smart door locks, and remote controls, requiring long life, fast charging, and high reliability.
For devices with a wide operating voltage window and demanding extremely fast charging and extended standby time, the YMIN SLX series (3.8V) is the preferred choice. – -SLX 3.8V 1.5-10F 3.55*7.7 (min)
For devices that are more cost-sensitive and have sufficient space, the YMIN SDS series (2.7V) is a highly cost-effective option. – -SDS 2.7V 1.0-2.0F 4*25
Conclusion
For engineers striving for long-term product reliability and green compliance, replacing traditional batteries with supercapacitors has become an attractive technology option. YMIN Electronics, through its solid electrochemical process and material innovations, provides market-proven, high-reliability capacitor solutions.
We hope this technical sharing will inspire your next product design. If you have any difficulties in capacitor application, please contact YMIN. We look forward to exploring more possibilities with you.
Post time: Oct-23-2025