Panasonic Ncr21700t Datasheet [extra Quality]

Panasonic NCR21700T Datasheet: Unveiling the Features and Benefits of this High-Performance Lithium-Ion Battery

The Panasonic NCR21700T is a high-performance lithium-ion battery designed for a wide range of applications, from consumer electronics to industrial devices. As a leading manufacturer of lithium-ion batteries, Panasonic has engineered the NCR21700T to deliver exceptional performance, reliability, and safety. In this blog post, we'll dive into the datasheet of the Panasonic NCR21700T, exploring its key features, specifications, and benefits.

Overview of the Panasonic NCR21700T

The Panasonic NCR21700T is a 21mm x 70mm cylindrical lithium-ion battery with a nominal voltage of 3.6V and a capacity of 4000mAh. The battery is designed to provide a high level of energy density, making it an ideal choice for applications where space and weight are limited.

Key Features and Specifications

Here are the key features and specifications of the Panasonic NCR21700T:

Capacity: 4000mAh (typical), 3800mAh (minimum)
Nominal Voltage: 3.6V
Maximum Discharge Current: 20A (continuous), 30A (pulse)
Maximum Charge Current: 10A (continuous), 20A (pulse)
Cycle Life: 300 cycles (80% capacity retention)
Operating Temperature: -20°C to 60°C (charge/discharge)
Storage Temperature: -20°C to 25°C (recommended)

Benefits of the Panasonic NCR21700T

The Panasonic NCR21700T offers several benefits that make it an attractive choice for various applications:

High Energy Density: The battery provides a high level of energy density, making it ideal for applications where space and weight are limited.
Long Cycle Life: The battery has a cycle life of 300 cycles, ensuring a long lifespan and minimizing the need for replacement.
High Discharge Rate: The battery can handle high discharge rates, making it suitable for applications that require high power output.
Wide Operating Temperature Range: The battery can operate over a wide temperature range, making it suitable for applications that require operation in extreme temperatures.

Applications of the Panasonic NCR21700T

The Panasonic NCR21700T is suitable for a wide range of applications, including:

Electric Vehicles: The battery can be used in electric vehicles, providing a reliable and efficient source of power.
Consumer Electronics: The battery can be used in consumer electronics, such as laptops, tablets, and smartphones.
Industrial Devices: The battery can be used in industrial devices, such as power tools and medical devices.
Renewable Energy Systems: The battery can be used in renewable energy systems, such as solar and wind power systems.

Conclusion

The Panasonic NCR21700T is a high-performance lithium-ion battery that offers exceptional performance, reliability, and safety. With its high energy density, long cycle life, and high discharge rate, the battery is suitable for a wide range of applications. Whether you're designing an electric vehicle, consumer electronics, or industrial devices, the Panasonic NCR21700T is an excellent choice. By understanding the features and benefits of this battery, you can design and develop innovative products that meet the demands of today's market.

The Panasonic NCR21700T is a high-performance lithium-ion battery known for its high energy density and substantial discharge capabilities. While often referred to in enthusiast communities as a "Tesla cell" due to its use in electric vehicle battery packs, it is also a popular choice for power tools, high-drain flashlights, and DIY energy storage. Core Technical Specifications panasonic ncr21700t datasheet

According to technical data from NCR21700 Data Sheet and BDtronics: Specification Model Name Size 21700 (21.1mm x 70.4mm) Nominal Capacity 4800mAh to 5000mAh Nominal Voltage Maximum Voltage Discharge Cut-off Continuous Discharge 10A to 30A (varies by source/load conditions) Pulse Discharge Cycle Life ~500 to 1000+ cycles (at 80% capacity) Approximate Weight 65g to 69g Key Performance Highlights

High Energy Density: The cell offers a volumetric energy density of approximately 775 Wh/l and a gravimetric density of 263 Wh/kg, making it highly efficient for its weight and size.

Operating Conditions: It is designed to work in temperatures ranging from -20°C to +60°C during discharge, though charging should strictly occur between 10°C and +45°C to prevent damage.

Form Factor Advantage: As a 21700 cell, it provides roughly 50% more capacity and energy than the older 18650 standard, allowing for longer runtimes in the same relative footprint. Market Reality & Identification

A notable aspect of the NCR21700T is its scarcity as a standalone retail product. Industrial users note that "NCR21700T" is often a label used for cells salvaged from Tesla Model 3 packs. These cells may lack standard barcodes or retail wraps, frequently appearing as bare cans with visible wire-bond removals. Genuine cells are often sourced through specialty retailers like Daraz or AliExpress. NCR21700 data sheet

Market, sourcing and authenticity

NCR21700T is produced by Panasonic Energy (and historically associated brands). Variants and clones appear in the aftermarket; capacity and current ratings quoted by resellers vary. Purchase from reputable authorized distributors to avoid counterfeit cells.
Verify cell identity via weight, dimensions, marking, and (where available) vendor traceability. Independent capacity and internal resistance testing of batches are advisable for critical builds.
Be cautious of third‑party sellers claiming extreme continuous current or cycle numbers; independent characterization should back such claims.

8. Where to Find the Official Datasheet

The most authoritative source is Panasonic’s Industrial Battery Division (now part of Panasonic Energy Co., Ltd.). As of 2026, the official datasheet (document number: DS-21700T-Rev4) can be found at: Benefits of the Panasonic NCR21700T The Panasonic NCR21700T

Panasonic Energy official website → Products → Cylindrical Lithium-ion → 21700 → NCR21700T
Authorized distributors like Digi-Key, Mouser, or RS Components (download links in the product page)
Battery specification aggregators such as Product Datasheet (product-datasheet.com) or Battery University

⚠️ Avoid random PDF hosting sites – many contain old revisions (e.g., 2019 pre-production specs with 12.5A limit). Always verify the revision date.

2. General Specifications Table

The following data represents the standard electrical and mechanical characteristics of the NCR21700T cell.

Safety Warning from the Datasheet

Panasonic is very clear on this: Do not solder directly to the cell. The NCR21700T is designed for spot-welded nickel strips. Soldering irons transfer too much heat into the cell, melting the internal separator and causing an internal short. If you see a loose NCR21700T with solder blobs on it, run away.

Application examples and recommended operating envelopes (practical)

Portable power bank: operate at ≤0.5C continuous; charge at ≤0.5C to 1C with CC‑CV; limit max SOC to 4.1 V for longer life if acceptable.
E‑bike pack: use conservative continuous discharge per cell (e.g., ≤2–5 A depending on pack cooling and number of parallel strings); design pack so peak current is shared across parallel cells.
Flashlight/high‑drain tool: if application requires sustained >10–15 A, prefer power‑optimized 21700 cells or multiple parallel NCR21700T cells; ensure thermal path to dissipate heat.

5. Safety and Handling per Datasheet

Panasonic includes a lengthy safety section. Key points:

Short circuit: The cell can deliver >50 A instantaneously. Do not short – causes venting, fire risk.
Overdischarge: Discharging below 2.0V permanently damages the cell and may cause copper shunting.
Mechanical abuse: Do not crush, puncture, or incinerate. Use insulation tape on terminals during assembly.
Storage: Store at 20–30°C, 40–60% SoC (≈3.6V–3.7V). Every 6 months, recharge to 3.7V if stored below 3.3V.
Thermal runaway threshold: 140°C internal temperature. If cell reaches this, vent with flame possible.

For OEMs, the datasheet mandates using a BMS with: the cell delivers near‑rated capacity

Overvoltage protection (4.25V cut)
Undervoltage protection (2.5V cut)
Overcurrent protection (20A typical)
Temperature monitoring (cut at 70°C case temperature)

Performance characteristics and tradeoffs

Energy vs power: NCR21700T is energy‑centric — excellent Wh/kg and Wh/L for 21700 format but not optimized for sustained very high C‑rates. At moderate currents (≤1C typical), the cell delivers near‑rated capacity; at higher currents, usable capacity and effective energy drop due to internal resistance and polarization.
Thermal behavior: significant self‑heating at high currents; thermal management (pack cooling, spacing, and thermal paths) strongly affects continuous current capability and cycle life.
Cycle life: deep cycles at high C‑rates and elevated temperature accelerate capacity fade; gentle charge/discharge, partial state‑of‑charge operation and lower max SOC extend life.
Charging: CC‑CV to 4.20 V recommended. Fast charging is possible but increases stress; follow manufacturer recommended max charge current to avoid rapid capacity loss or safety risks.
Safety: as with all high‑energy Li‑ion cells, risks include internal shorting, external abuse (overcharge, overdischarge, mechanical damage), and thermal runaway. Battery management, cell balancing, current limiting, fusing, and mechanical protection are mandatory in systems.

Electrical Specifications

| Parameter | Value |
|-----------|--------|
| Standard Charge Current | 1.5 A (0.3 C) |
| Max. Charge Current | 4 A (0.8 C) |
| Charge Cut-off Voltage | 4.20 V ±0.03 V |
| Standard Discharge Current | 2.5 A |
| Max. Continuous Discharge Current | 15 A (or up to 20 A pulsed, check latest specs) |
| Discharge Cut-off Voltage | 2.5 V |
| AC Impedance (1 kHz) | ≤ 30 mΩ |