INR-21700-40T 4000mAh 35A High Power Lithium-Ion Battery Cell for Power Tools, E-Bike and High-Drain Btteray Packs
INR-21700-40T 4000mAh High Power Lithium-Ion Battery Cell
The INR-21700-40T is a high-power rechargeable lithium-ion battery cell designed for demanding applications requiring strong continuous current, reliable power delivery, and a compact high-energy 21700 format.
With a 3.6V nominal voltage, 4000mAh capacity, and 35A maximum continuous discharge capability, the 40T provides approximately 14.4Wh of energy per cell while maintaining excellent high-drain performance.
The combination of high capacity and strong power output makes it suitable for cordless power tools, e-bikes, light electric vehicles, robotics, industrial equipment, and custom high-power battery packs.
INR-21700-40T Battery Cell Specifications
| Parameter | Specification |
|---|---|
| Product Name | INR-21700-40T Lithium-Ion Battery Cell |
| Model | INR21700-40T |
| Cell Format | 21700 Cylindrical Cell |
| Battery Type | Rechargeable Lithium-Ion Battery |
| Nominal Voltage | 3.6V |
| Standard Discharge Capacity | Min. 4000mAh |
| Rated Discharge Capacity | Min. 3900mAh |
| Nominal Energy | Approx. 14.4Wh |
| Maximum Charging Voltage | 4.20V |
| Standard Charging Current | 2A |
| Rated Charging Current | 6A |
| Charging Method | CC/CV |
| Maximum Continuous Discharge | 35A without temperature cutoff |
| Temperature-Limited Discharge | 45A with 80°C surface temperature cutoff |
| Discharge Cut-Off Voltage | 2.5V |
| Cycle Life | ≥2400mAh after 250 cycles under specified test conditions |
| Maximum Diameter | 21.22mm |
| Maximum Height | 70.30mm |
| Maximum Cell Weight | 70g |
| Terminal Type | Flat Top |
| Protection | Unprotected Cell |
| Battery Pack Protection | External BMS Required |
| Recommended Charge Temperature | 0°C to 45°C |
| Recommended Discharge Temperature | -20°C to 60°C |
| Main Applications | Power Tools / E-Mobility / Robotics / Industrial Equipment / Custom Battery Packs |
| OEM/ODM Battery Pack | Supported |
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INR-21700-40T 4000mAh High Power Lithium-Ion Battery Cell
The INR-21700-40T is a high-power rechargeable lithium-ion battery cell designed for demanding applications requiring strong continuous current, reliable power delivery, and a compact high-energy 21700 format.
With a 3.6V nominal voltage, 4000mAh capacity, and 35A maximum continuous discharge capability, the 40T provides approximately 14.4Wh of energy per cell while maintaining excellent high-drain performance.
The combination of high capacity and strong power output makes it suitable for cordless power tools, e-bikes, light electric vehicles, robotics, industrial equipment, and custom high-power battery packs.
Why Choose INR-21700-40T?
1. 4000mAh High Capacity
The 4000mAh capacity provides strong energy storage while maintaining high-power discharge capability.
Customer Benefits
- Longer equipment runtime
- Higher energy per cell
- Efficient battery pack design
- Reduced cell count in some configurations
2. 35A Continuous High Discharge
The 40T supports up to 35A continuous discharge without a temperature cutoff, making it suitable for demanding high-current applications.
Customer Benefits
- Strong continuous power output
- Stable performance under heavy loads
- Suitable for high-current equipment
- Improved system responsiveness
3. Balanced Energy and Power Performance
Unlike purely energy-focused 21700 cells, the 40T combines:
4000mAh Capacity + 35A Continuous Discharge
This makes it suitable for applications that require both runtime and strong power output.
Customer Benefits
- Better balance between capacity and power
- Versatile application range
- Reduced compromise in battery pack design
- Suitable for professional equipment
4. High Energy 21700 Platform
The larger 21700 cylindrical format provides approximately 14.4Wh nominal energy per cell based on the 3.6V nominal voltage and 4000mAh capacity.
Customer Benefits
- Higher energy per cell
- Efficient use of battery pack space
- Flexible pack architecture
- Suitable for compact high-power systems
5. Designed for High-Drain Applications
The INR-21700-40T is particularly suitable for equipment requiring sustained power delivery.
Recommended Applications
- Cordless power tools
- E-bikes
- Electric scooters
- Light electric vehicles
- Robotics
- AGV / AMR
- Industrial equipment
- Custom lithium-ion battery packs
6. Flexible Battery Pack Configuration
The 40T can be connected in series and parallel to create customized battery systems.
Example Configurations
10S1P
36V-class high-power battery pack
13S1P
48V-class battery pack
10S2P
Higher-capacity and higher-current 36V-class system
13S2P
Higher-capacity 48V-class battery system
The final battery pack configuration should be determined according to system voltage, load requirements, BMS design, thermal management, and safety requirements.
7. Professional OEM Battery Pack Integration
The INR-21700-40T can be integrated into customized battery solutions for professional manufacturers.
Available Customization
- Series and parallel configuration
- BMS integration
- Connector customization
- Wiring harness design
- Battery enclosure
- Communication interface integration
- Custom labels
- OEM packaging
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YiFang specializes in batteries, chargers, battery packs, and power solutions, including Li-ion, LiMn (IMR), Ni-MH, and LiFePO₄ batteries.
Does YiFang provide OEM/ODM services?
Yes, we offer flexible OEM and ODM customization, including product design, specifications, and packaging to meet your exact requirements.
What industries use YiFang products?
Our products are widely used in e-cigarettes, UAVs, balance scooters, electric bikes, electronic equipment, toys, flashlights, and other commercial and industrial applications.
What is YiFang’s production capacity?
YiFang operates its own factory with automated production lines, producing up to 100,000 units daily, ensuring consistent quality and timely delivery.
How can I contact YiFang for orders or inquiries?
You can contact us via our website inquiry form, email, or phone. Our team is ready to provide professional guidance and customized solutions.
What industries use YiFang products?
Our products are widely used in e-cigarettes, UAVs, balance scooters, electric bikes, electronic equipment, toys, flashlights, and other commercial and industrial applications.
What industries use YiFang products?
Our products are widely used in e-cigarettes, UAVs, balance scooters, electric bikes, electronic equipment, toys, flashlights, and other commercial and industrial applications.
What warranty and after-sales support does YiFang offer?
We provide 6–12 months warranty, responsive customer support, and global insurance coverage for long-term reliability and customer peace of mind.
