Panasonic Ncr21700t Datasheet Hot Review

: Approximately 21.1mm in diameter and 70.4mm in length (Flat top style). Thermal & Safety Characteristics

The is a high-performance lithium-ion battery cell originally popularized as a primary component in Tesla Model 3 battery packs. While often difficult to find through official retail channels as a standalone consumer product, it is highly sought after in the DIY EV and flashlight communities for its balance of high capacity and discharge capability. Core Specifications

The "hot" designation in your query likely refers to the cell's thermal behavior under load. -20∘Cnegative 20 raised to the composed with power C +60∘Cpositive 60 raised to the composed with power C

Here's how the Panasonic NCR21700T stacks up against popular alternatives on the market: panasonic ncr21700t datasheet hot

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The datasheet includes a temperature vs. discharge curve. At room temperature (25°C), you get 4,000 mAh. At 0°C, you lose about 20% capacity. But at 60°C+ (where you operate at 35A), cycle life drops by nearly 50%. Running this cell at its "hot" max rating means you are sacrificing lifespan for performance.

In this article, we dissect the official Panasonic NCR21700T datasheet, translate the electrical jargon, and explain exactly why this cell runs hot, where the thermal limits are, and how to use it safely without venting your device. : Approximately 21

Are you designing a or looking for specific thermal cooling recommendations for this cell? NCR21700 data sheet

Building a battery pack with NCR21700T cells requires careful attention to their safety limits.

The Panasonic NCR21700T is a high-performance lithium-ion battery cell designed for various applications, including electric vehicles, renewable energy systems, and industrial power tools. In this guide, we will explore the key features, specifications, and characteristics of the NCR21700T battery cell based on its datasheet. Core Specifications The "hot" designation in your query

| Specification | Common Values Found | Source Reliability | | :--- | :--- | :--- | | | 4800mAh or 5000mAh | High | | Nominal Voltage | 3.6V or 3.7V | High (Minor variance) | | Max Continuous Discharge | 10A, 15A, 20A, 30A | Low to High |

The NCR21700T runs hotter than the Samsung 40T under identical loads. Why? Higher internal resistance. While the datasheet claims <18mΩ, real-world DC internal resistance (DCIR) often measures 20-24mΩ at room temperature. As the cell heats up, resistance climbs, creating a vicious heat loop.

These are the hard limits defined by Panasonic to prevent thermal runaway or permanent degradation.

The datasheet specifies a maximum operating temperature of 60°C for the case . If you measure the metal can and it reads 65°C, you are outside of the warranty spec. At 70°C, the separator inside the cell begins to shrink. This is the physical mechanism that causes a short circuit. A hot NCR21700T is not just uncomfortable; it is structurally failing.