The nominal voltage of this battery is typically 3.6V or 3.7V, with a charging cut-off voltage of 4.2V and a discharge cut-off voltage of 2.5V.
This voltage range ensures the battery's stability and safety. Furthermore, the maximum discharge current of the 21700 lithium battery is typically between 10A and 30A,
with peak instantaneous discharge capabilities of up to 45A, meeting the demands of high-power devices like power tools and electric vehicles.
Energy density is one of the key indicators of a battery's performance, and the 21700 lithium battery has an energy density of 200-250Wh/kg,
which is about 20% higher than the 18650 battery. This feature means that, for the same weight, the 21700 lithium battery can provide longer endurance,
making it especially crucial for applications that require high efficiency and longevity.
Application Prospects of the 21700 Lithium Battery
Due to its excellent performance, the 21700 lithium battery shows broad application prospects across multiple fields. In the electric vehicle industry,
it has become an important choice for enhancing driving range. The successful implementation of this battery in the Tesla Model 3 has demonstrated its capabilities,
and other automakers are gradually adopting this battery to improve the performance and market competitiveness of their electric vehicles.
In the power tools market, the 21700 lithium battery is highly favored for its high discharge rate and long cycle life.
Whether in drills, angle grinders, or other heavy-duty tools, this battery provides stable and continuous power, meeting the demands of professional users.
| Category | Specification |
|---|
| 3.1 Nominal Capacity | 5000mAh (at 0.2C Discharge) |
| Minimum Capacity | 4900mAh (at 0.2C Discharge) |
| Measurement Condition | Discharge at 0.2C to 2.5V end voltage after standard full charge at 25°C |
| 3.2 Maximum Charge Voltage | 4.20V ± 0.03V |
| 3.3 Average Working Voltage | 3.60V @ 0.2C |
| 3.4 Standard Charge Method | Method: Constant Current and Constant Voltage (CC/CV) |
| Current: 0.2C (1000mA) |
| Voltage: 4.2V |
| End Current: 100mA ± 5mA |
| 3.5 Maximum Charge Current | 0℃ ≤ T ≤ 10℃: 0.1C (500mA) |
| 10℃ < T ≤ 20℃: 0.2C (1000mA) |
| 20℃ < T ≤ 45℃: 0.7C (3500mA) |
| 3.6 Charge Time | Standard Charge: 6.0h |
| Rapid Charge: 2.0h |
| 3.7 Standard Discharge | Method: Constant Current (CC) |
| Current: 1.0C (5000mA) |
| End Voltage: 2.5V |
| 3.8 Maximum Discharge Current | -20℃ ≤ T ≤ 20℃: 1.0C (5000mA) |
| 20℃ < T ≤ 35℃: 2.0C (10000mA) |
| 35℃ < T ≤ 45℃: 1.0C (5000mA) |
| 3.9 Cycle Life | ≥70% of 1st capacity after 500 cycles (25℃ ± 2℃, 4.2V-2.5V) |
| Cycle Life Notes | High rates and high temperatures (≥35°C) can shorten cycle life. Safety risks arise at ≥65°C. |
| 3.10 Weight of Bare Cell | Avg. 72g ± 4g |
| 3.11 Operating Temperature | Charge: 0°C ~ 45°C |
| Discharge: -20°C ~ 45°C |

EASTAR specializes in high-performance cylindrical lithium batteries, offering reliable and high-quality solutions for various applications. Our products include a wide range of lithium batteries that provide excellent performance and long-lasting power for everything from portable devices to high-power systems. Our Battery Range: 18650 Battery: 800mAh to 3500mAh, with high energy density for devices like flashlights, laptops, and drones. 21700 Battery: 3000mAh to 5000mAh, ideal for power tools, electric vehicles, and high-power applications. 26650 Battery: 3000mAh to 5200mAh, designed for high-drain devices that require long runtimes. 14500 Battery: 600mAh to 1000mAh, similar to AA batteries but with higher voltage, for portable electronics. 16340 Battery: 600mAh to 1000mAh, a rechargeable alternative to CR123A batteries, for small devices. 10440 Battery: 200mAh to 600mAh, similar to AAA batteries, with higher voltage for compact devices.
Comprehensive Product List and Key Features
14500 Model
• Nominal Capacity: 700mAh
• Rated Energy: 2.59Wh
• Max Discharge Current: 700mA
• Dimensions: 14.5mm (D) x 49mm (H)
• Applications: Small electronic devices, LED lighting, portable equipment
18650 Models
• Capacity Range: 800mAh - 3500mAh
• Energy Range: 2.96Wh - 12.95Wh
• Max Discharge Current: 800mA - 10000mA (10A)
• Dimensions: 18.13mm (D) x 65.10mm (H)
• Weight: 27g - 45g
• Applications: Flashlights, power banks, e-bikes, laptops, power tools
21700 Models
• Capacity Range: 3000mAh - 5000mAh
• Energy Range: 12.21Wh - 18.5Wh
• Max Discharge Current: 10000mA - 15000mA (10A-15A)
• Dimensions: 21.13mm (D) x 70.10mm (H)
• Weight: 60g - 70g
• Applications: Electric vehicles, high-drain devices, energy storage systems
26650 Models
• Capacity Range: 5000mAh - 5500mAh
• Energy Range: 18.5Wh - 20.35Wh
• Max Discharge Current: 15000mA (15A)
• Dimensions: 28.18mm (D) x 65.10mm (H)
• Weight: 70g
• Applications: High-capacity power storage, solar energy systems, industrial equipment
Key Features
• High energy density and stable performance
• Wide operating temperature range
• Long cycle life and low self-discharge rate
• Suitable for high-drain and high-capacity applications
| Model | Nominal Voltage (V) | Nominal Capacity (mAh) | Max Discharge Current (mA) | Charging Voltage (V) | Discharge Voltage (V) | Max Diameter (mm) | Max Height (mm) |
|---|
| ICR14500 | 3.7 | 700 | 700 | 4.2 | 2.75 | 14.3 | 49 |
| ICR18650 | 3.7 | 800 | 800 | 4.2 | 2.75 | 18.13 | 65.10 |
| ICR18650 | 3.7 | 1200 | 1200 | 4.2 | 2.75 | 18.13 | 65.10 |
| ICR18650 | 3.7 | 1500 | 1500 | 4.2 | 2.75 | 18.13 | 65.10 |
| ICR18650 | 3.7 | 1800 | 1800 | 4.2 | 2.75 | 18.13 | 65.10 |
| NCM18650 | 3.7 | 2000 | 2000 | 4.2 | 2.75 | 18.13 | 65.10 |
| NCM18650 | 3.7 | 2200 | 2200 | 4.2 | 2.75 | 18.13 | 65.10 |
| NCM18650 | 3.7 | 2600 | 3C | 4.2 | 2.75 | 18.13 | 65.10 |
| NCM18650 | 3.7 | 3200 | 3C | 4.2 | 2.75 | 18.13 | 65.10 |
| NCM18650 | 3.7 | 3400 | 3C | 4.2 | 2.75 | 18.13 | 65.10 |
| NCM18650 | 3.7 | 3500 | 3500 | 4.2 | 2.75 | 18.13 | 65.10 |
| NCM21700 | 3.7 | 3000 | 3000 | 4.2 | 2.75 | 21.13 | 70.10 |
| NCM21700 | 3.7 | 4000 | 4000 | 4.2 | 2.75 | 21.13 | 70.10 |
| NCM21700 | 3.7 | 4500 | 3C | 4.2 | 2.75 | 21.13 | 70.10 |
| NCM21700 | 3.7 | 4800 | 3C | 4.2 | 2.75 | 21.13 | 70.10 |
| NCM21700 | 3.7 | 5000 | 3C | 4.2 | 2.75 | 28.18 | 65.10 |
| NCM26650 | 3.7 | 5500 | 3C | 4.2 | 2.75 | 28.18 | 65.10 |
| NCM26650 | 3.7 | 5500 | 3C | 4.2 | 2.75 | 28.18 | 65.10 |

