——Smart Rings, Bracelets, and Necklace
——Keywords: Discreet, Fashionable, Low Power Consumption
1. Market Overview and Battery Testing Demand
1.1 Product Scope
Biometric-Sensing Jewelry refers to wearable devices that embed biometric sensors (heart rate, blood oxygen, temperature, emotion, etc.) into jewelry forms combining fashion decoration with health monitoring functions. Representative products include smart rings, smart necklaces and smart bracelets.
1.2 Market Size and Shipment Outlook
With the advancement of health monitoring, AI interaction, and seamless wearing technologies, the combined shipments of the three major categories have shown a continuous upward trend from 2024 to 2034. Total shipments are expected to grow from approximately 55 million units in 2024 to over 135 million units in 2034, more than doubling over the decade. In particular, after 2029, the slope of the total shipment curve becomes noticeably steeper, entering a period of accelerated growth.
Among them, smart rings, smart bracelets, and smart necklaces are becoming important product forms of biosensing wearables. Preliminary market research data shows that in 2024, global smart bracelet shipments were approximately 52.3 million units, and smart rings approximately 1.8 million units; by 2025, smart bracelet shipments are expected to be approximately 54.1 million units, and smart rings are expected to reach approximately 4 million units. Among these, smart bracelets have a large existing market base, but overall growth is stabilizing; smart rings are in a phase of rapid expansion, with shipments expected to reach approximately 15 million units in 2030 and further grow to approximately 37.5 million units in 2034. Smart necklaces are still in the early market stage, but their applications in AI, health monitoring, and personalized services are growing rapidly. Model projections estimate a growth rate of approximately 41%, with smart necklace shipments expected to increase from approximately 1 million units in 2025 to approximately 22.03 million units in 2034.
https://www.idc.com/promo/wearablevendor/
https://www.iyiou.com/news/202604211127504
1.3 Battery Testing Equipment Market Opportunity
Driven by the intelligentization of wearable AI, micro-power battery testing equipment is a niche segment growing significantly faster than the industry average. The global market size for this field was approximately USD 82.45 million in 2025 and is projected to increase to USD 162 million by 2032, with a CAGR of 10.14%, nearly twice the overall battery testing equipment market growth rate (approximately 5.4%). The root cause of this growth differential lies in the transformation of terminal product forms: smart ring batteries are only 15–25mAh, smart necklaces approximately 50–200mAh, and smart bracelets in the 100–500mAh range. These micro batteries impose rigid requirements on testing equipment for μA-level current resolution, multi-range dynamic response, and ultra-low leakage current. Meanwhile, safety standards such as IEC 62133, UL 1642, and UN 38.3 continue to tighten, pushing brands and battery manufacturers to shift testing investment in R&D and quality control from “optional” to “mandatory.” In terms of competitive landscape, concentration in this field has not yet solidified, and small and medium-sized specialized manufacturers still have room for differentiated entry.
Battery Testing Requirements by Product Category
Category | Typical Battery Capacity | Core Test Items | Precision Requirements | Market Maturity | Equipment Demand Urgency |
Smart Ring | 15–25mAh | Capacity, μA-level leakage current, cycle life, DCIR | Extremely high (μA level) | ★★★★★ | High |
AI Necklace/Pendant | 50–200mAh | Capacity, rate charge/discharge, standby power consumption, cycle life | High (mA/μA level) | ★★★★ | High |
Smart Bracelet | 100–500mAh | Capacity, cycle life, safety testing, DCR | Medium-high | ★★★★ | Medium-high |
1.4 The role of Battery Testing in Wearble Performance
Battery Performance = Wear Time + Sensor Stability + Data Continuity
In the field of biometric-sensing jewelry, battery testing is the key determinant of product success. Battery performance directly determines how long the device can be worn, whether sensors can continue to operate stably, and whether health data remains uninterrupted. Smart ring batteries are only 15–25mAh, and AI necklace batteries approximately 50–200mAh. Any slight capacity fade, internal resistance increase, or leakage current exceeding limits will lead to shortened battery life, sensor disconnection, and data gaps, causing user experience to collapse instantly. Only through high-precision battery testing to verify key indicators such as capacity, internal resistance, cycle life, and standby power consumption can it be ensured that the battery still meets the requirements of all-day wear and continuous monitoring in an extremely small volume. Therefore, battery testing is not an auxiliary link, but a core quality infrastructure that biometric-sensing jewelry must rely on from R&D to mass production.
1.5 Technical and Commercial Challenges
Technical Battery Level:
- μA-level leakage current measurement challenges: smart rings have standby power consumption often at the microampere level, and excessive leakage current from the equipment itself can mask the true signal, leading to distorted coulombic efficiency calculations.
- Data artifacts caused by contact resistance: small battery tabs have extremely small cross-sectional areas and large internal resistance; poor fixture contact can directly cause good products to be misjudged as defective.
- Micro battery safety testing risks: compact spaces have poor heat dissipation, and testing capability under extreme conditions such as overcharge, over-discharge, and short circuit is extremely demanding.
Market Level:
- Lack of a unified micro battery testing standard framework; testing conditions of different institutions are not unified, making data difficult to compare horizontally.
- Wearable categories iterate quickly with small single-batch procurement volumes, imposing higher requirements on equipment suppliers for flexible adaptation and rapid delivery.
- International brands still hold a large share in the high-end market; Chinese manufacturers still need to break through in brand recognition and high-end penetration, while CE, UL, UN 38.3 and other compliance certifications increase export costs.
- Downstream brands are still in the market cultivation period, are cost-sensitive, and test equipment budgets face the risk of being compressed.
2. Product Application and Battery Performance Issues
2.1 Smart Ring
2.1.1 Key Features and Use Cases
Test Content: Heart rate (bpm), HRV (RMSSD, ms), blood oxygen saturation (SpO2, %), skin temperature (°C), respiratory rate (breaths/min), sleep staging (awake/light/deep/REM duration), stress index (0–100), number of nighttime blood oxygen drops.
Use Cases: Nighttime sleep apnea screening, female menstrual cycle tracking, stress and recovery status assessment.
2.1.2 Reported Battery Life and Safety Issues
- Cliff-like battery life decline
- This is the most concentrated complaint. A large number of Samsung Galaxy Ring users report that the device initially maintains 5–7 days of battery life, but after a period of use, it plummets to less than 24 hours, with some users even experiencing extreme situations of “1% battery drop every two minutes.” One user stated that the ring’s battery life dropped from 5 days to less than 4 hours within a month. RingConn users have also reported that after one year of use, battery life directly dropped to half a day, along with charging abnormalities.
- Battery swelling safety hazards
- There have been multiple cases of Galaxy Ring battery expansion causing the ring to become stuck on fingers, ultimately requiring hospital assistance for removal. Samsung attributes some issues to battery defects and has provided replacements or refunds for some users.
2.2 Smart Necklace
2.2.1 Key Features and Use Cases
Test Content: Emotion tags (calm/pleasant/anxious/depressed), heart rate (bpm), HRV (ms), respiratory rate (breaths/min), voice tone features, environmental noise (dB), dietary image recognition (food category, calories kcal, protein/fat/carbs g), GPS trajectory, sedentary duration (minutes);
Use Cases: Automatic diet recording, emotional health diary, meeting recording transcription and summarization.
2.2.2 Reported Battery Performance
- Friend necklace’s typical “failure”
- Official claimed battery life is 15 hours, but multiple media tests and user feedback show actual usage is only about 4 hours, evaluated as “more power-consuming than a smartphone.” Some users describe it as “what hangs around your neck is not a caring companion, but more like a plastic spy that needs constant charging.”
- Nuna’s relatively stable performance
- In contrast to Friend, the emotion-tracking Nuna necklace officially claims standby time of up to 48 hours, with relatively positive battery life feedback.
2.3 Smart Bracelet
2.3.1 Key Featues and Use Cases
Test Content: Steps (steps), distance (km), calorie consumption (kcal), heart rate (bpm) and heart rate zone duration, HRV (ms), blood oxygen (SpO2, %), respiratory rate (breaths/min), sleep staging and duration, stress index (0–100), maximum oxygen uptake (VO2max, ml/kg/min), training load and recovery time (hours).
Use Cases: Running/cycling/swimming sport mode automatic recognition, all-day stress monitoring, sleep quality analysis.
2.3.2 Reported Battery Life and Degrafation Issues
- Mixed reviews on new device battery life
- Some users are satisfied with battery life. For example, a user tested the Mijia bracelet with heart rate, message push, and sleep tracking enabled, and after 7 days still had 68% battery remaining, exceeding expectations. But other users reported that the Xiaomi Bracelet 10 only lasted 4 days with only basic functions enabled, with severe power consumption.
- Concentrated complaints about battery degradation after use
- A large number of complaints focus on severe battery drain after about one year of use. For example, some users reported that the Redmi Bracelet 5 “used to last 15–20 days on a full charge,” but after the warranty expired, the battery severely drained; Xiaomi Bracelet 8 NFC version users also encountered the problem that “after just over a year, the battery life collapsed, and I have to charge it every day when I get home.” On the Black Cat complaint platform, cases of battery life degradation and rapid power drain for brands such as Xiaomi, Huawei, and dido are numerous.
3.Representative Enterprise & Battery Demand Analysis
3.1 Battery Requirements of Representative Enterprise
3.2 Common Battery Characteristics and Testing Needs
The batteries of smart rings, smart bracelets, and smart necklaces share high commonality: capacities range from 12–500mAh, nominal voltage 3.7–3.9V, charging current at mA level, generally using irregular-shaped soft-pack lithium polymer batteries. Core testing needs focus on μA-level leakage current detection, small current charge/discharge precision, DCIR internal resistance testing, cycle life assessment, and pulse condition simulation.
3.3 NEWARE Model Recommandation
Product Model | BTS-9004-5V5A |
Product Series | BTS—9000 |
Max Voltage | 5V |
Min Discharge Voltage | 0.7V |
Output Ranges | R1: 0.1μA~150μAR2: 150μA~5mAR3: 5mA~150mAR4: 150mA~5000mA |
Accuracy | ±0.02% of FS |
Channels Per Unit | 4 Channels |
Data Record Frequency | 1000Hz |
Min Pulse Width | 400μs |
Note: Final equipment selection must be based on actual battery voltage, charge/discharge current, capacity, and testing requirements.