3.7V Curved Lithium Battery for Wireless Headphones and AR Glasses

Traditional rectangular batteries create “dead space” in the curved housings of wireless headphones and AR glasses. EPT’s curved Lithium Polymer batteries are custom-shaped to follow the contours of the human head, maximizing capacity within ergonomic wearables.

• Innovative Shape: Curved geometry eliminates spatial waste in rounded device frames and earcups.
• High Energy Density: Provides 3.7V of stable power without sacrificing user comfort or aesthetics.
• Application Focus: Specifically engineered for the next generation of Smart Glasses, VR headsets, and Hi-Fi headphones.
• Thermal Management: Optimized heat dissipation to maintain a cool temperature during extended wear.
• B2B Engineering: Comprehensive design support to match the specific radius of your hardware’s industrial design.

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Description
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Battery Specifications:

Type: Polymer Lithium Battery
Dimensions: 19 × 28.0 × 17.0 mm
Nominal Voltage: 3.7V
Nominal Capacity: 70mAh
Applications:
Adhesive medical devices, smart rings, wearable electronics, flexible displays, wireless headphones, and AR glasses.

Product Features:
After 500 charge–discharge cycles, the capacity retention rate remains above 80%.
The battery cell can be bent from 0° to 120° without affecting performance.

⊙ Cell Dimensions: 8.4 × 28.0 × 17.0 mm

⊙ Nominal Voltage: 3.7V

⊙ Capacity Options: 50mAh / 70mAh / 100mAh / 120mAh

⊙ Charge Cut-off Voltage: 4.2V

⊙ Discharge Cut-off Voltage: 3.0V

⊙ Charging Current: 0.2C

⊙ Discharging Current: 0.5C

⊙ Operating Temperature: -20°C to 80°C

⊙ Lithium Battery Protection:
Overcharge protection, over-discharge protection, overcurrent protection, and short-circuit protection.

⊙ Product Features:
EPT curved lithium battery saves internal space and enables optimal product design.
Supports custom curved battery solutions.
Offers excellent charge–discharge cycling performance and a long service life.

⊙ Application Fields:
Adhesive medical devices, smart rings, wearable electronics, flexible displays, wireless headphones, and AR glasses.