Our Location
304 North Cardinal St.
Dorchester Center, MA 02124

Advanced Customization & Technology
Ultra-narrow batteries represent a differentiation strategy for next-generation micro-electronics. By integrating high-energy-density Li-ion/Li-polymer systems, BATFT achieves widths as thin as 4.1mm, perfectly suited for devices with demanding volume and weight requirements.
Technical Highlights:
Safety & Resilience: Stable performance under extreme conditions, including over-discharge, short-circuits, and nail penetration tests.
Multi-Dimensional Customization: Our technology can merge ultra-narrow profiles with ultra-thin or curved architectures, providing a truly 3D power solution.
Key Features
Higher Energy Density: Superior power storage in a minimal footprint.
Optimized Spatial Efficiency: Maximizes battery capacity while minimizing product design constraints.
Ultra-Low Self-Discharge: Ideal for long-term shelf life and extended standby.
High Voltage Support: Compatible with high-voltage systems ranging from 4.2V to 4.4V.
Extended Cycle Life: Maintains over 1,000 cycles (at 0.5C).
Customizable PCM: Protection Circuit Modules (PCM) can be tailored to meet specific electrical requirements.
Why Choose BATFT Custom Ultra-Narrow Batteries?
Our custom-shaped cells are engineered with a precision five-layer core architecture: an outer protective pouch film encapsulating a cathode, an insulating separator, and an anode. Current is conducted through precision tabs, with electrolytes filling the gaps within the stack. Depending on your design, tabs can be configured on the same side or opposite sides of the cell.
BATFT utilizes proprietary innovative technologies to deliver ultra-narrow Li-ion batteries with industry-leading reliability and safety.
Minimum Width: Achievable widths as narrow as 4.1mm to 6mm.
Bespoke Integration: We provide a turnkey solution (Cell + BMS + Structural Design) tailored to the remaining internal volume of your device.
Global Support: Localized technical hubs in China, the USA, and Germany for real-time customer assistance.
Professional Services
Flexible Custom Solutions: Bespoke shapes and specifications.
Reliable & Stable Performance: Zero-compromise quality standards.
Prototyping & Mass Production: Support from initial samples to full-scale manufacturing.
OEM & ODM Services: Comprehensive original design and equipment manufacturing.
BATFT ultra-narrow batteries are specifically designed for space-constrained consumer electronics:
Wearables & Smart Accessories: Smart rings, smartwatches, wristbands, and smart jewelry.
Audio & Digital Gifts: Bluetooth headsets (TWS), e-cigarettes, and electronic gifts.
Smart Education: Intercom reading pens and smart learning devices.
Specialized IoT: Micro-sensors and security devices.
Healthcare: Wearable health monitors and medical diagnostic patches.
Technical Specifications: Ultra-Narrow Battery Series
| Model | Charge Cut-off | Rate | Capacity | Thickness | Width | Length | Shape |
| BATFT1606022 | 4.2V | 1C | 13mAh | 1.6mm | 6.5mm | 22mm | Ultra-Narrow |
| BATFT4907013 | 4.2V | 1C | 19mAh | 4.54mm | 7.9mm | 13mm | Ultra-Narrow |
| BATFT3409021 | 4.2V | 1C | 55mAh | 3.15mm | 9.5mm | 21.5mm | Ultra-Narrow |
| BATFT5511035 | 4.2V | 20C | 125mAh | 5.4mm | 10.9mm | 31mm | Ultra-Narrow |
| BATFT6711060 | 4.35V | 30C | 300mAh | 6.6mm | 11mm | 60.8mm | Ultra-Narrow |
| BATFT4609021 | 4.4V | 1C | 88mAh | 4.24mm | 9.3mm | 21.1mm | Ultra-Narrow |
| BATFT6611085 | 4.35V | 30C | 465mAh | 6.60mm | 11mm | 85.5mm | Ultra-Narrow |
| (Table truncated for brevity, all models follow standard naming) |
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