Panasonic includes a lengthy safety section. Key points:
For OEMs, the datasheet mandates using a BMS with:
Cycle life is highly dependent on Depth of Discharge (DoD) and ambient temperature.
First, a bit of trivia. This cell is famously known as the "Tesla cell." When Tesla moved from 18650s to 21700s for the Model 3, Panasonic was their primary partner. While Tesla uses a slightly modified chemistry (the "Tesla-specific" variant), the off-the-shelf NCR21700T is the closest you can get to automotive-grade power.
The Panasonic NCR21700T uses standard LiNiCoAlO2 (NCA) chemistry – similar to Tesla cells. Charging requirements:
| Parameter | Recommended | Absolute Max |
|-----------|-------------|---------------|
| Charge voltage | 4.20 V | 4.25 V (risk of plating) |
| Standard charge current | 1.5 A (0.3C) | – |
| Fast charge current | 3.0 A (0.6C) | 4.0 A (must cut off at 4.20V) |
| Trickle charge (below 2.5V) | Do not apply – cell considered damaged | |
| Temperature range | 0°C to +45°C | – |
Critical warning from the datasheet: Do not charge below 0°C. Lithium plating occurs, causing internal short circuits. Also, do not float charge – terminate when current drops to <100 mA.
| Use Case | Verdict | Reason |
|----------|---------|--------|
| Solar lights / backup power | ✅ Excellent | Low drain, long cycle life, low self-discharge. |
| Laptop battery packs | ✅ Good | 4.2V standard, 4800 mAh ideal for 2-3 cell designs. |
| Portable power banks | ✅ Very good | High energy density, moderate charge/discharge fits USB-C PD 45W. |
| E-bike / power tools | ❌ No | 9.6A max = <500W peak. Will overheat or trip BMS. |
| Vaping | ❌ Dangerous | Exceeds 2C pulse rating. Risk of venting. |
| EV conversion (small) | ⚠️ Marginal | Only for low-power (e.g., electric wheelchair), not scooters. |
Panasonic’s target applications, as implied by the NCR21700T datasheet, include:
Not recommended for: Sub-ohm vaping (requires 30A+), jump starters, or any device exceeding 18A continuous without active cooling.
Rating: 3.5 / 5 – Good for specific use, poor for general high-drain applications.
Buy if: You need a high-capacity 21700 for low-current devices (<3A per cell), long runtime, and minimal self-discharge.
Avoid if: Your load exceeds 5A continuous, or you need fast charging (<1 hour).
Final note to engineers: The datasheet is honest but incomplete. Always perform your own thermal and cycle-life tests at your intended discharge rate. The 2C limit is real – exceeding it will accelerate aging and may cause cell venting.
Would you like a comparison of this cell against Samsung 50G or Molicel P42A for your specific project?
The Panasonic NCR21700T is a high-performance, cylindrical lithium-ion cell designed for high-drain applications that require both high energy density and substantial power output. Often referred to as a "Tesla-style" cell due to its 21700 form factor, it offers a significant capacity jump over traditional 18650 batteries while maintaining a compact profile for battery packs. Key Specifications at a Glance
Based on official NCR21700 datasheets and technical specifications from BDtronics, here are the core electrical and physical parameters: Specification Model Typical Capacity Rated/Minimum Capacity 4800mAh – 4900mAh Nominal Voltage 3.6V – 3.7V Max Charge Voltage Discharge Cut-off Voltage 2.5V – 3.0V Max Continuous Discharge 10A to 30A (Depending on variant/temp) Peak Discharge Current Cycle Life 500 – 1000+ cycles Weight ~65g – 70g Dimensions 21.1mm (D) x 70.4mm (H) Performance Characteristics NCR21700 data sheet
If you are into high-performance flashlights, DIY power walls, or electric vehicles (ironically), you have likely heard of the Panasonic NCR21700T.
While the world went crazy for the 18650, the 21700 form factor is the new king of capacity and power density. And the NCR21700T? It sits right at the top of the throne.
But you shouldn’t buy a cell based on marketing hype. You need to read the datasheet. Let’s strip down the official specs and see what this battery is actually capable of.
Panasonic Ncr21700t Datasheet -
Panasonic includes a lengthy safety section. Key points:
For OEMs, the datasheet mandates using a BMS with:
Cycle life is highly dependent on Depth of Discharge (DoD) and ambient temperature.
First, a bit of trivia. This cell is famously known as the "Tesla cell." When Tesla moved from 18650s to 21700s for the Model 3, Panasonic was their primary partner. While Tesla uses a slightly modified chemistry (the "Tesla-specific" variant), the off-the-shelf NCR21700T is the closest you can get to automotive-grade power.
The Panasonic NCR21700T uses standard LiNiCoAlO2 (NCA) chemistry – similar to Tesla cells. Charging requirements:
| Parameter | Recommended | Absolute Max |
|-----------|-------------|---------------|
| Charge voltage | 4.20 V | 4.25 V (risk of plating) |
| Standard charge current | 1.5 A (0.3C) | – |
| Fast charge current | 3.0 A (0.6C) | 4.0 A (must cut off at 4.20V) |
| Trickle charge (below 2.5V) | Do not apply – cell considered damaged | |
| Temperature range | 0°C to +45°C | – | panasonic ncr21700t datasheet
Critical warning from the datasheet: Do not charge below 0°C. Lithium plating occurs, causing internal short circuits. Also, do not float charge – terminate when current drops to <100 mA.
| Use Case | Verdict | Reason |
|----------|---------|--------|
| Solar lights / backup power | ✅ Excellent | Low drain, long cycle life, low self-discharge. |
| Laptop battery packs | ✅ Good | 4.2V standard, 4800 mAh ideal for 2-3 cell designs. |
| Portable power banks | ✅ Very good | High energy density, moderate charge/discharge fits USB-C PD 45W. |
| E-bike / power tools | ❌ No | 9.6A max = <500W peak. Will overheat or trip BMS. |
| Vaping | ❌ Dangerous | Exceeds 2C pulse rating. Risk of venting. |
| EV conversion (small) | ⚠️ Marginal | Only for low-power (e.g., electric wheelchair), not scooters. |
Panasonic’s target applications, as implied by the NCR21700T datasheet, include:
Not recommended for: Sub-ohm vaping (requires 30A+), jump starters, or any device exceeding 18A continuous without active cooling.
Rating: 3.5 / 5 – Good for specific use, poor for general high-drain applications. Panasonic includes a lengthy safety section
Buy if: You need a high-capacity 21700 for low-current devices (<3A per cell), long runtime, and minimal self-discharge.
Avoid if: Your load exceeds 5A continuous, or you need fast charging (<1 hour).
Final note to engineers: The datasheet is honest but incomplete. Always perform your own thermal and cycle-life tests at your intended discharge rate. The 2C limit is real – exceeding it will accelerate aging and may cause cell venting.
Would you like a comparison of this cell against Samsung 50G or Molicel P42A for your specific project?
The Panasonic NCR21700T is a high-performance, cylindrical lithium-ion cell designed for high-drain applications that require both high energy density and substantial power output. Often referred to as a "Tesla-style" cell due to its 21700 form factor, it offers a significant capacity jump over traditional 18650 batteries while maintaining a compact profile for battery packs. Key Specifications at a Glance For OEMs, the datasheet mandates using a BMS with:
Based on official NCR21700 datasheets and technical specifications from BDtronics, here are the core electrical and physical parameters: Specification Model Typical Capacity Rated/Minimum Capacity 4800mAh – 4900mAh Nominal Voltage 3.6V – 3.7V Max Charge Voltage Discharge Cut-off Voltage 2.5V – 3.0V Max Continuous Discharge 10A to 30A (Depending on variant/temp) Peak Discharge Current Cycle Life 500 – 1000+ cycles Weight ~65g – 70g Dimensions 21.1mm (D) x 70.4mm (H) Performance Characteristics NCR21700 data sheet
If you are into high-performance flashlights, DIY power walls, or electric vehicles (ironically), you have likely heard of the Panasonic NCR21700T.
While the world went crazy for the 18650, the 21700 form factor is the new king of capacity and power density. And the NCR21700T? It sits right at the top of the throne.
But you shouldn’t buy a cell based on marketing hype. You need to read the datasheet. Let’s strip down the official specs and see what this battery is actually capable of.