Ymin Capacitors Solve The EU Export Certification And Lifespan Issues Of Bluetooth Thermometers

(MENAFN- Market Press Release) January 13, 2026 7:31 pm - How to Replace Lithium Titanate Batteries with Double-Layer Supercapacitors to Solve the EU Export Certification and Lifespan Challenges for Bluetooth Thermometers?

I. Issues of Concern to Designers/Manufacturers

1. Issue Type: Design Support

Question: In Bluetooth thermometer design, after replacing lithium titanate batteries with double-layer supercapacitors, does the overall power management strategy need to be readjusted?

Answer: Yes. The overall power management strategy must be redesigned after replacing lithium titanate batteries with double-layer supercapacitors. The core difference is that the output voltage of a double-layer supercapacitor decreases linearly with discharge, while a lithium titanate battery provides a relatively stable voltage. This can lead to unstable operation of the MCU and Bluetooth module under low-voltage conditions. Therefore, it is recommended to add a voltage monitoring circuit, configure a DC-DC voltage regulator module, or add low-voltage protection and dynamic adjustment strategies to the firmware to ensure the stability of the device throughout its operating cycle.

2. Issue Type: Design Support

Question: Will the rapid charging and discharging characteristics of double-layer supercapacitors affect the stability or signal strength of BLE broadcasting?

Answer: No. While double-layer supercapacitors can provide high current for short periods, their output power may be insufficient for high-power operation as the voltage decays. If the Bluetooth thermometer is intended for continuous broadcasting or high-frequency data transmission, it is recommended to optimize the power management scheme. This could involve adjusting the broadcast interval, temperature sampling period, or adding an energy prediction mechanism to the firmware to ensure BLE signal stability and communication reliability.

3. Question Type: Design Support

Question: Is the operating voltage window of a double-layer supercapacitor (e.g., 2.7V or 3.8V) sufficient to cover the power requirements of the Bluetooth main control chip?

Answer: Yes. The typical voltage range of a double-layer supercapacitor is 2.7V to 3.8V, which covers the power requirements of most Bluetooth main control chips. During the design phase, it is necessary to confirm the minimum operating voltage and power consumption curves of the thermometer's main control chip and Bluetooth module. If necessary, a boost converter can be added or a low-voltage operating mode can be enabled to ensure the device operates normally throughout the entire discharge cycle, avoiding power outages or restarts due to insufficient voltage.

4. Question Type: Performance Comparison

Question: In extreme temperature environments (e.g., -40? to 85?), is the performance of double-layer supercapacitors more reliable than lithium titanate batteries?

Answer: Double-layer supercapacitors generally have better reliability than lithium titanate batteries in extreme temperatures. They have a wider operating temperature range (typically -40? to 85?), smaller capacity decay at high and low temperatures, longer cycle life, and no safety hazards such as thermal runaway. Due to their physical energy storage method, double-layer supercapacitors are less affected by low temperatures and can maintain stable performance even in high-temperature environments of 85? and above, exhibiting significantly better overall temperature resistance than lithium titanate batteries.

5. Question Type: Life Cycle

Question: Is there a risk of voltage decay or leakage in double-layer supercapacitors during long-term storage or transportation?

Answer: Double-layer supercapacitors exhibit natural self-discharge; the voltage will gradually decrease during long-term storage or transportation. This is not a risk of leakage. Manufacturers typically provide typical self-discharge data and recommend incorporating short-term recharge or rapid wake-up functions into the design to ensure normal operation during manufacturing, transportation, and long-term standby. Hybrid supercapacitors exhibit excellent self-discharge performance, with an annual self-discharge rate of

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