08120 3.7V 60mAh Li Polymer Cylindrical Battery is a compact cylindrical battery solution developed for next-generation portable electronics requiring high energy density in a limited space.
With a diameter of 8mm and height of 12mm, this ultra-small battery is specially designed for applications where traditional pouch cells cannot provide the required shape flexibility.
The battery delivers stable power performance with a 60mAh capacity, supporting continuous operation for compact devices including Bluetooth headsets, smart rings, hearing aids, GPS trackers, and wearable electronics.
Thanks to Yideng's advanced lithium battery technology, the 08120 supports customized development according to customer requirements, including battery structure, protection design, connector configuration, and product packaging.
Nominal Voltage: 3.8V
Delivery Voltage: 3.8V ~ 4.2V
Nominal Capacity: 60mAh
Measurement: 8 × 12mm
At Yideng, 08120 3.7V 60mAh Li Polymer Cylindrical Battery undergoes a complete quality inspection process from raw materials to finished products. Our intelligent manufacturing system and professional testing equipment ensure stable performance, safety, and batch consistency for global customers.
Before production, key battery materials including electrodes, separators, and raw materials are strictly inspected to verify quality and stability.
During production, Yideng uses an MES digital management system to monitor each manufacturing process, ensuring complete production traceability and consistent product quality.
Each battery batch is tested for:
- Capacity accuracy
- Voltage consistency
- Internal resistance
- Charge and discharge performance
- Self-discharge rate
to ensure reliable power output for compact electronic devices.
Before shipment, batteries undergo multiple safety checks including:
- Overcharge protection testing
- Over-discharge protection testing
- Short circuit testing
- Leakage inspection
- Thermal performance evaluation
The 08120 lithium polymer battery supports international safety standards including:
- IEC62133
- UN38.3
- UL1642
- RoHS
These certifications help customers meet global transportation and product compliance requirements.
| Item | Specification |
| Model | 08120 |
| Material | Li-ion Polymer Battery |
| Normal Capacity (0.2C) | 60mAh |
| Minimum Capacity (0.2C) | 60mAh |
| Energy | 0.228Wh |
| Normal Voltage | 3.8V |
| Delivery Voltage | 3.8V ~ 4.2V |
| 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%) |
The Li Polymer Cylindrical Battery is widely used in industries requiring small-size, lightweight, and reliable power solutions.
Applications:
- Smart rings
- Smart bracelets
- Smart patches
- Wearable sensors
Advantages:
- Ultra-compact size
- Lightweight design
- Stable long-term power supply
Applications:
- TWS earbuds
- OWS earbuds
- Bluetooth headsets
Benefits:
- Reliable discharge performance
- Fast charging support
- Compact installation
Applications:
- Hearing aids
- Portable medical monitoring devices
Advantages:
- High safety performance
- Stable output
- Long service life
Applications:
- GPS trackers
- Smart sensors
- Mini electronic devices
Applications:
- Beauty instruments
- Electronic toys
- Portable digital products
A1: The battery is mainly designed for compact electronic devices including Bluetooth headsets, smart rings, hearing aids, GPS trackers, wearable devices, and IoT products.
A2: Yideng is a professional lithium battery manufacturer with independent R&D, production facilities, quality control systems, and global supply capabilities.
A3: Yes. Yideng supports OEM/ODM customization including:
- Capacity
- Connector
- Wire
- Protection circuit
- Packaging
- Battery specifications
A4: The Li Polymer Cylindrical Battery for bluetooth headset supports international certifications including:
- IEC62133
- UN38.3
- UL1642
- RoHS
Certification availability depends on customer requirements and application standards.
A5: The standard size is:
Diameter: 8mm
Height: 12mm
The compact cylindrical design makes it suitable for small electronic devices.
A6: Yes. Yideng provides samples for qualified customers to verify battery performance and compatibility before mass production.
A7: Yideng supports flexible order quantities, including sample orders and large-scale production orders based on customer requirements.
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Xin'an Village industrial Park, Yonglejiang Town, AnrenCounty, Chenzhou City, Hunan Province, China
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