Main Question: With limited space on the power bank board, are there capacitors with a capacitance 10% or more higher than standard in the 6.3*5.8mm size?

- Related Question: Within the standard 6.3*5.8mm size, what is the maximum capacitance value YMIN can achieve? What voltage options are available?

- Question Type: Selection Question / Technical Specifications

- Answer: YMIN's VPX series offers 35V 100μF/120μF/150μF and 25V 220μF/270μF specifications for this size. The 25V 220μF model is approximately 15% higher than competitors of the same size, improving energy storage and filtering capabilities within limited space.

- Related Question: I need to replace two existing parallel capacitors with one of your capacitors. How can I confirm if the capacitance value is sufficient?

- Question Type: Compatibility/Replacement/Design Support

- Answer: Capacitance can be selected based on capacitance value. For example, two 25V 100μF capacitors in parallel can be replaced with one 25V 220μF capacitor, resulting in a higher total capacitance, better consistency, lower ESR, and superior filtering performance. Simulation models and test data can be provided for verification.

- Related Question: Does high capacitance density mean sacrificing ESR or ripple performance?

- Question Type: Performance Comparison/Technical Principle

- Answer: No. Yongming utilizes nano-level high-voltage anode foil and special conductive polymer materials to increase capacitance while maintaining low ESR. The VPX series achieves an ESR as low as 40mΩ at 1MHz, effectively suppressing high-frequency ripple and meeting the requirements of fast charging circuits.

- Related Question: How does your high-capacitance capacitor exhibit capacitance decay at high temperatures? - Question Type: Reliability/Failure

- Answer: Yongming capacitors are designed for high-temperature operation at 105℃/125℃. They undergo a 2000-hour lifespan test at full rated voltage, with a capacitance decay rate ≤10%, exceeding industry standards and ensuring long-term stable operation in high-temperature environments.

- Related Question: Are there any successful cases of replacing high-capacitance capacitors of the same size from Japanese brands (such as Panasonic and Guimi)?

- Question Type: Case Study/Reputation/Compatibility/Replacement

- Answer: Yes. In multiple fast-charging power bank projects, the smallest size of the same specification from competitors is 6.3*7.7mm, while Yongming can achieve 6.3*5.8mm, offering a significant space advantage.

## Main Question: Your VPX series is smaller than competitors'; will this affect its lifespan and stability at high temperatures?

- Related Question: How do you guarantee the lifespan of your small-sized capacitors? Do you have test data?

- Question Type: Reliability/Failure/Test Verification

- Answer: All products undergo rigorous high-temperature load life testing. The VPX series has been tested at 105℃/125℃ and rated voltage for 2000 hours, and parameters such as capacitance, ESR, and leakage current all meet the standards. Data can be found in the datasheet and reliability test report.

- Related Question: Will smaller size lead to poorer heat dissipation? How to assess temperature rise?

- Question Type: Design Support/Reliability/Failure

- Answer: Small-size capacitors use low-loss materials and optimized electrode structures, resulting in low self-heating. Their smaller size also makes it easier to plan heat dissipation channels on the PCB, facilitating heat dissipation.

- Related Question: In a compact space, will the close arrangement of multiple small-size capacitors cause mutual interference or heat dissipation problems?

- Question Type: Design Support

- Answer: The main concern with close arrangement of multiple capacitors is overall system heat dissipation. Yongming capacitors have low ESR, reducing self-heating. It is recommended to refer to the application guide to maintain appropriate spacing and utilize PCB copper foil for auxiliary heat dissipation. Layout optimization suggestions can be provided.

- Related Question: What standard is your 2000-hour lifespan test based on?

- Question Type: Test Verification / Regulatory Compliance

- Answer: Applying rated voltage to a high-temperature environment and monitoring electrical parameters periodically, the 2000-hour test far exceeds basic requirements, verifying the product's long-term reliability under extreme conditions.

- Related Question: For small size and long lifespan, what special treatments have you made in materials or processes?

- Question Type: Technical Principle

- Answer: The core is the nano-level anode foil to increase the charge storage capacity per unit volume; a special polymer electrolyte ensures thermal stability and conductivity; and a rigorous sealing process ensures that the core's performance does not degrade under high-temperature and high-humidity environments.

## Main Question: If I use your high-capacitance capacitors, can I reduce the number of capacitors in parallel? How much can the overall BOM cost be reduced?

- Related Question: If I replace multiple traditional capacitors with one Yongming capacitor, how much can the BOM cost be specifically saved?

- Question Type: Cost Analysis

- Answer: Savings come from three aspects: material costs (single unit cost is lower than the sum of multiple units), surface mount costs (reduced mounting time), and management costs (simplified BOM, reduced warehouse management complexity). We can assist with a specific BOM comparison analysis.

- Follow-up Question: Will reducing the number of capacitors affect the PCB layout difficulty?

- Question Type: Design Support / Solution

- Answer: No, it actually simplifies the layout. Fewer components make routing simpler, provide more board space, and the saved space can be used for larger batteries or more powerful heat dissipation modules, improving overall system performance.

- Follow-up Question: What are the benefits of a simplified BOM for production yield?

- Question Type: Supply Chain / Cost Analysis

- Answer: A simplified BOM directly improves production first-pass yield, reduces the probability of incorrect or missing components, facilitates solder paste printing and reflow soldering process control, and improves overall production efficiency and yield.

- Follow-up Question: Besides the BOM, what other hidden costs are reduced? - Question Type: Lifecycle/Cost Analysis

- Answer: It can also reduce hidden costs such as R&D (simpler design and debugging), procurement (reduced workload for price inquiries and order tracking), quality risks (more centralized supplier management), and maintenance (easier troubleshooting).

- Related Question: Is there a replacement guide for changing from "multiple traditional capacitors" to "a single Yongming capacitor"?

- Question Type: Compatibility/Replacement/Design Support

- Answer: No relevant documents have been released yet. You can contact us directly, provide your existing capacitor models or specifications, and our technical team will customize a customized replacement solution.

## Main Question: How effective are your high-capacitance-density capacitors at ripple suppression? Do you have before-and-after waveform comparisons?

- Related Question: What are the impedance curves of your capacitors in a XXX kHz switching power supply?

- Question Type: Technical Parameters / Performance Comparison

- Answer: Yongming's high-capacitance density capacitors maintain extremely low impedance in the mid-to-high frequency range of 100kHz-1MHz. The typical ESR value of the VPX series at 1MHz is only 40mΩ, effectively absorbing high-frequency switching noise. See the product specification sheet for a complete impedance-frequency curve.


- Related Question: Do you have actual measured data on ripple noise in fast charging protocol (such as PD/QC) testing?


- Question Type: Test Verification / Case Study / Reputation

- Answer: Yes. In cases such as 170W power banks, using Yongming capacitors significantly reduced the voltage ripple at full load, fully meeting the requirements of fast charging chips.


- Related Question: Which is more important for ripple suppression: high capacitance or low ESR? How do you balance these factors in your capacitors?


- Question Type: Technical Principles

- Answer: Both are indispensable. High capacitance addresses low-frequency ripple and maintains voltage stability, while low ESR is the core of suppressing high-frequency noise and reducing voltage fluctuations caused by ripple current. YMIN capacitors combine high capacitance with low ESR, achieving excellent ripple suppression across the entire frequency band.

- Related Question: How does ripple performance change throughout the capacitor's lifespan?

- Question Type: Reliability/Failure-related/Life Cycle-related

- Answer: Using stable conductive polymer materials, the capacitor's ESR and capacitance change minimally throughout its lifespan. After a 2000-hour lifespan test, the ripple suppression capability shows negligible degradation, ensuring long-term stability.

## Main Question: Do your solid-state capacitors comply with the latest EU battery regulations? Do you have RoHS certification?

- Related Question: Do YMIN capacitors meet RoHS 2.0 and REACH (SVHC) requirements?

- Question Type: Regulatory Compliance

- Answer: Yes, all YMIN solid-state capacitors comply with EU RoHS 2.0 and amendments, and meet REACH SVHC declaration requirements. Relevant certificates can be viewed and downloaded.

- Related Question: Our products are to be exported to the EU. Will using your capacitors comply with the (EU) 2023/1542 battery regulation?

- Question Type: Regulatory Compliance

- Answer: Yes, Yongming capacitors are not batteries and are not subject to this regulation.

- Related Question: Do you have compliance testing reports issued by third-party organizations?

- Question Type: Regulatory Compliance / Case Study / Reputation

- Answer: Yes, we regularly commission CNAS/CMA accredited third-party organizations to test for RoHS and other environmental protection items. The reports are objective and authoritative and can serve as evidence of our customers' product compliance.

- Related Question: Do the capacitor packaging materials also meet environmental requirements?

- Question Type: Regulatory Compliance / Life Cycle

- Answer: Yes, Yongming adheres to a comprehensive environmental protection philosophy. All packaging materials, including reels, trays, and boxes, meet environmental requirements. We can provide material declarations to help our customers achieve green and environmentally friendly practices throughout the entire product lifecycle.