21700 Tabless Cell
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- Original 2170 Lithium ion Battery.
- Taless Battery Technology.
- Ternary Lithium Materials.
- 21700 Tabless Battery Cell.
- 21700 High Drain Battery 70A.
- 21700 Battery High Capacity 4000mAh.
- 10C More Max. Continuous Discharge Rate.
21700 Tabless Cell
| Model | INR21700-RS40 |
| Standard Discharge Capacity | Min. 3950mAh |
| Charge: 0.5C(2.0A) CCCV 4.2V, 100mA cut-off, 25±3℃, rest 30min. | |
| Discharge: 0.2C(0.8A), 2.5V cut-off, 25±3℃. | |
| 1C=4.0A | |
| ACIR | ≤4.0mΩ |
| Nominal Voltage | 3.6V |
| End-of-charge Voltage | 4.2V |
| Discharge Cut-off Voltage | 2.5V |
| Standard Charge Current | 2.0A |
| Standard Discharge Current | 0.8A |
| Rate Charge | 8A |
| Max. Continuous Charge Current | 14A |
| Max. Continuous Discharge Current | 70A(with 80℃ temperature cut-off) |
| Operating Surface Temperature | Charge: -20℃~60℃ |
| Discharge: -40℃~80℃ | |
| Storage Temperature | 1 Year, -20℃~25℃ |
| 3 Months, -20℃~45℃ | |
| 1 Month, -20℃~60℃ | |
| Cell Weight | ≤67.0g |
| Cell Dimension | Diameter: 21.35mm Max. |
| Height: 70.30mm Max. |
Tabless battery technology represents a significant architectural shift in cylindrical lithium-ion cell design, moving away from traditional "tabs" toward a continuous contact system. In a standard battery, a small metal tab connects the internal electrode to the external casing, creating a bottleneck for electrical flow and a primary source of heat. In contrast, "tabless" designs utilize the entire edge of the electrode foil to conduct current, dramatically reducing internal resistance and optimizing thermal management.
The industry gained major momentum with the Tesla 4680 Tabless Battery, which proved that larger form factors could maintain high performance without overheating. By removing the traditional tab, the 4680 Tabless structure allows electrons to travel a much shorter distance, resulting in faster charging speeds and higher power output. This breakthrough has paved the way for smaller, high-power formats, most notably the advanced 21700 battery cell variants now entering the market.
Leading manufacturers are applying this logic to specialized high-performance models like the Reliance INR21700 battery series. For instance, the INR21700-45D and the INR21700-RS40 leverage this architecture to provide extreme discharge rates for professional power tools and racing drones. Similarly, high-capacity versions like the INR21700-50PL and the INR21700-RS50 utilize tabless connections to balance high energy density with cooler operating temperatures. By eliminating the thermal constraints of traditional tabs, these cells offer a more reliable and efficient energy solution for the next generation of electric mobility and industrial applications.
The industry gained major momentum with the Tesla 4680 Tabless Battery, which proved that larger form factors could maintain high performance without overheating. By removing the traditional tab, the 4680 Tabless structure allows electrons to travel a much shorter distance, resulting in faster charging speeds and higher power output. This breakthrough has paved the way for smaller, high-power formats, most notably the advanced 21700 battery cell variants now entering the market.
Leading manufacturers are applying this logic to specialized high-performance models like the Reliance INR21700 battery series. For instance, the INR21700-45D and the INR21700-RS40 leverage this architecture to provide extreme discharge rates for professional power tools and racing drones. Similarly, high-capacity versions like the INR21700-50PL and the INR21700-RS50 utilize tabless connections to balance high energy density with cooler operating temperatures. By eliminating the thermal constraints of traditional tabs, these cells offer a more reliable and efficient energy solution for the next generation of electric mobility and industrial applications.
| Tabless Models | Reference |
| INR18650-JP30 | 18650 Tabless Battery |
| INR18650-30PL | Tabless 18650 Battery |
| INR18650-30XG | Tabless Battery 18650 |
| INR21700-RS40 | 21700 Tabless Cell |
| INR21700-40PL | 21700 Tabless Battery |
| INR21700-JP40 | Tabless 21700 Cells |
| INR21700-40XG | Tabless 21700 40XG Battery |
| INR21700-40P | Tabless Lithium Cell |
| INR21700-42P | Tabless Li ion Cells |
| INR2170-45D | Tabless 21700 Battery |
| INR2170-50D | Tabless 21700 50D Battery |
| INR21700-50PL | Tabless 21700 |
| INR21700-RS50 | 21700 Tabless |
| INR21700-50XG | 21700 Tabless Cells |
| INR21700-RH60 | Tabless Cells 21700 |
| 4680 Tesla Battery | 4680 Tabless Battery |
Established as a leader in high-performance energy solutions, Reliance Battery specializes in the development of advanced cylindrical lithium-ion cells tailored for demanding industrial and consumer applications. The company’s portfolio is anchored by its innovative tabless technology, which significantly reduces internal resistance and enhances thermal management during high-rate operations.
A cornerstone of their high-drain lineup is the Reliance RH60 battery, a cell engineered to provide a superior balance of energy density and power delivery. For professionals requiring extreme discharge capabilities, the 21700-RS40 offers a 4000mAh capacity with an impressive 70A continuous discharge rating, making it an ideal choice for power tools and electric mobility platforms. Those seeking extended runtimes without compromising on output often turn to the 21700-RS50, which elevates the capacity to 5000mAh while maintaining the same robust 70A discharge ceiling.
Furthermore, the 21700-RH60 represents the pinnacle of the series' high-capacity offerings, delivering 6000mAh to support long-duration missions in fields such as smart robotics, drones, and portable energy storage. By leveraging IATF 16949-certified manufacturing processes, Reliance ensures that each cell provides ultra-wide temperature resilience and a long cycle life. These technical milestones position Reliance Battery as a pivotal partner for industries transitioning toward more efficient, high-power electrification.
A cornerstone of their high-drain lineup is the Reliance RH60 battery, a cell engineered to provide a superior balance of energy density and power delivery. For professionals requiring extreme discharge capabilities, the 21700-RS40 offers a 4000mAh capacity with an impressive 70A continuous discharge rating, making it an ideal choice for power tools and electric mobility platforms. Those seeking extended runtimes without compromising on output often turn to the 21700-RS50, which elevates the capacity to 5000mAh while maintaining the same robust 70A discharge ceiling.
Furthermore, the 21700-RH60 represents the pinnacle of the series' high-capacity offerings, delivering 6000mAh to support long-duration missions in fields such as smart robotics, drones, and portable energy storage. By leveraging IATF 16949-certified manufacturing processes, Reliance ensures that each cell provides ultra-wide temperature resilience and a long cycle life. These technical milestones position Reliance Battery as a pivotal partner for industries transitioning toward more efficient, high-power electrification.
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