Discover our high-performance 3.7V prismatic polymer battery pack for Bluetooth earbuds and smart rings, engineered specifically for ultra-compact micro-wearables. Weighing approximately 3.0g, this lightweight lithium polymer cell supports a maximum charging and discharging current of 1C (CC/CV) with a precise 0.02C charging cutoff and a 3.0V over-discharging termination voltage. Designed for reliability and longevity, it delivers an impressive cycle life of ≥300 cycles (thickness expansion ≤10%) and ≥500 cycles (thickness expansion ≤12%). With a broad operating temperature range (0°C to 50°C for charging; -20°C to 60°C for discharging), this premium battery pack ensures exceptional safety and thermal stability, making it the perfect slim power solution for next-generation smart rings, TWS earbuds, and miniature IoT devices.
Nominal Voltage: 3.7V
Delivery Voltage: 3.7V ~ 4.2V
Nominal Capacity: 28mAh
Battery Weight: 3g
Measurement: 4.4 × 9.1 × 11.5mm
| Item | Specification |
| Model | 430911 |
| Material | Li-ion Polymer Battery |
| Normal Capacity (0.2C) | 28mAh |
| Minimum Capacity (0.2C) | 28mAh |
| Energy | 0.1036Wh |
| Normal Voltage | 3.7V |
| Delivery Voltage | 3.85V ~ 4.05V |
| Standard Charge Method | Charge at maximum current. When the battery or pack terminal voltage reaches the charging limit voltage, charge at constant voltage until the charging current is less than or equal to 0.02 C, then stop charging. |
| Discharge Program | The battery or the battery pack carries on the constant current discharge with the maximum discharge current to the discharge termination voltage. |
| Max Charging Current | 1C CC/CV → 0.02C cutoff |
| Max Discharging Current | 1C CC/CV → 3.0V cutoff |
| Over-Discharging Current | 3.0V |
| Operation Temperature Range |
Charging: 0°C ~ 50°C Discharging: -20°C ~ 60°C |
| Allowable Maximum Surface Temperature |
Charging: Tmax ≤ 50°C Discharging: Tmax ≤ 60°C |
| Storage T/H Range (time) |
-20°C ~ 60°C (Less than 1 month) -20°C ~ 45°C (Less than 3 months) -20°C ~ 25°C (Less than 1 year) |
| Cycle Life |
≥ 300 times (Thickness expansion rate ≤ 10%) ≥ 500 times (Thickness expansion rate ≤ 12%) |
| Pack Weight | Approx. 3.0g |
Engineered for next-generation micro-electronics, our 430911 3.7V prismatic polymer battery pack for Bluetooth earbuds and smart rings delivers an ultra-compact cell design tailored for high-density spacing. This micro-form factor boasts a highly flexible form factor, allowing hardware engineers to maximize internal spatial efficiency in sleek, curved, or ultra-thin wearable architectures. Despite its miniature footprint, the cell features an exceptionally low idle power loss, mitigating parasitic drain to ensure extended standby times and a superior user experience for low-power smart rings and premium TWS earbuds.
Safety and thermal resilience are paramount in wearable technologies, and this 430911 3.7V prismatic polymer battery is built to exceed industry standards with its advanced puncture-resistant casing. This robust, specialized outer layer effectively isolates the internal chemistry against structural deformities or external physical impacts, eliminating leakage risks during daily wear. Furthermore, the cell operates flawlessly across a wide operating thermal window, maintaining stable voltage discharge and strict thermal safety parameters even under extreme environmental temperature fluctuations.
Lithium ion polymer battery is widely used in digital products:
430911 3.7V prismatic polymer battery pack for Bluetooth Earbuds and Smart Rings, Headphone Products, 3C Digital Products, GPS, electric toys, beauty instruments, aromatherapy machines, Consumer Electronics Products, Electric Bicycles etc.
Tailored Packaging: All products are shipped in standard robust export cartons, with bespoke, brand-customized packaging options fully available upon request.
Flexible Freight Channels:
- Express Courier (UPS, DHL, FedEx, TNT): Rapid door-to-door transit within a 3-15 day window.
- Air Freight: Reliable airport-to-airport transit averaging approximately one week.
- Ocean Freight: Cost-effective maritime shipping for bulk orders, with an estimated transit time of one month.
Turnaround Time: Orders are typically dispatched within 4 to 25 business days following payment clearance and final packaging approval.
Yideng established in 2016, Yideng gathers a solid technical team including 7 doctoral researchers running professional R&D labs for fast-charging shaped cell upgrades. 68 proprietary patents back reliable OEM & ODM customization for worldwide buyers.
Our company participates in many international exhibitions every year, including trade shows in Hong Kong, India, Japan, the United States, and more.
A1: Yes, we ship samples to all mainstream overseas markets safely.
A2: Every sample goes through full K-value and aging inspection before delivery.
A3: Third-party inspection is welcome before mass order shipment.
A4: MES system tracks every production step for complete batch traceability.
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Xin'an Village industrial Park, Yonglejiang Town, AnrenCounty, Chenzhou City, Hunan Province, China
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