Eu Stock Reliance RS50/RS60 a Grade 21700 5000mah 70A 3.6v Rechargeable Tabless 21700 Cells for Battery Pack Flashlight
- 5000mAh High Capacity for Longer Tool Runtime
- Up to 70A maximum continuous discharge under specified test conditions.
- 5000mAh + High Current in One 21700 Cell
- ≤4.0mΩ Low Internal Resistance Internal Resistance ≤4.0mΩ
- Wide Discharge Temperature Range -30°C to 75°C Discharge
- Designed for Battery Pack Integration
- Battery Pack OEM/ODM Support
21700 RS50 Battery Cell Specifications
| Item | Specification |
|---|---|
| Product Name | 21700 RS50 Lithium-ion Battery Cell |
| Model | INR21700-RS50 |
| Battery Type | Rechargeable Lithium-ion Cell |
| Cell Format | 21700 Cylindrical |
| Nominal Voltage | 3.6V |
| Nominal Capacity | 5000mAh / 5Ah |
| Minimum Capacity | Approx. 4950mAh* |
| Nominal Energy | 18Wh |
| Charging Voltage | 4.2V |
| Discharge Cut-off Voltage | 2.5V |
| Maximum Continuous Charge Current | Up to 15A* |
| Maximum Continuous Discharge | Up to 70A* |
| Cell Diameter | Approx. 21.1–21.35mm* |
| Cell Height | Approx. 70.2–70.3mm* |
| Weight | Approx. 66–67g* |
| Chemistry | NMC / Ni-based Lithium-ion |
| Cell Structure | Cylindrical High-Power Cell |
| Cycle Life | 500+ cycles* |
| Operating Temperature | Application dependent |
| Terminal | Flat Top |
| Protection | Unprotected Cell |
| Application | High-Power Battery Pack |
| OEM/ODM | Supported |
* Note: Public sources show different revisions/test conditions for some specifications, particularly discharge current, dimensions, cycle-life definition and temperature limits. For your final independent-site datasheet, I recommend replacing these values with the latest original manufacturer datasheet for your actual RS50 batch. For example, one public manufacturer-derived source lists 70A continuous discharge with an 80°C cutoff, while another technical database evaluates the cell at 40A continuous.
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Related Blogs
- 5000mAh High Capacity for Longer Tool Runtime
- Up to 70A maximum continuous discharge under specified test conditions.
- 5000mAh + High Current in One 21700 Cell
- ≤4.0mΩ Low Internal Resistance Internal Resistance ≤4.0mΩ
- Wide Discharge Temperature Range -30°C to 75°C Discharge
- Designed for Battery Pack Integration
- Battery Pack OEM/ODM Support
1. 5000mAh High Capacity
The 5Ah nominal capacity provides approximately 18Wh of energy per cell, helping battery manufacturers achieve longer runtime without increasing the number of cells excessively.
Customer Benefits:
- Longer operating time
- Higher pack energy
- Fewer cells for certain pack configurations
- Better space utilization
2. High-Power Discharge Capability
RS50 is designed for high-drain applications where conventional energy-oriented cells may not provide sufficient power.
Public sources report high continuous-current capability, with the exact allowable current dependent on thermal conditions and the applicable manufacturer specification.
Customer Benefits:
- Strong acceleration response
- Stable high-load operation
- Reduced voltage sag
- Suitable for demanding power systems
3. High Energy Density 21700 Format
The 21700 cylindrical format provides a useful balance between capacity, power and pack integration.
Customer Benefits:
- Higher capacity per cell
- Compact battery pack design
- Efficient use of internal pack space
- Suitable for high-performance battery systems
The RS50 is reported at approximately 269Wh/kg gravimetric energy density in public cell databases.
4. Designed for High-Drain Applications
The RS50 is particularly suitable when equipment requires both energy and high current.
Recommended applications:
- E-bike
- Light EV
- Power tools
- Robotics
- Industrial equipment
- High-power battery packs
- Custom lithium battery systems
5. Flexible Battery Pack Configuration
The cell can be connected in series and parallel configurations to create different battery pack specifications.
For example:
10S2P → 36V-class battery pack
13S2P → 48V-class battery pack
14S4P → high-capacity 48V-class battery pack
The final configuration should be selected according to the required voltage, capacity, current, BMS and thermal design.
6. Suitable for Professional OEM Battery Development
The RS50 can be integrated into customized battery packs for equipment manufacturers and battery-pack companies.
OEM Support:
- Battery pack design
- Series/parallel configuration
- BMS integration
- Connector selection
- Structural design
- Custom labeling
- Custom packaging
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What products does YiFang offer?
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.
