Panasonic Ncr21700t Datasheet -

Panasonic NCR21700T is one of the most enigmatic cells in the lithium-ion world. While "datasheets" for this specific model number are elusive, it is widely recognized by enthusiasts and industry experts as the elusive Tesla Model 3 cell The Identity Crisis: Is it even "Real"?

In the consumer market, you won't find an official Panasonic-branded PDF for the "NCR21700T." This is because these cells were primarily manufactured at the Tesla/Panasonic Gigafactory for exclusive use in Tesla battery packs. Most "NCR21700T" cells found in the wild are actually "pulls"—cells salvaged from Tesla modules—or gray-market units. Core Technical Specifications

Based on testing and related documentation for the Panasonic 21700 family, here is the breakdown of its performance: Specification (Approx.) Nominal Capacity 4,800 mAh to 5,000 mAh Nominal Voltage Max Charge Voltage Standard Charge Current 2.5A (approx. 0.5C) Continuous Discharge 10A (Optimal) up to 15A Max Discharge (Pulse) Up to 20A (with significant heat/sag) Energy Density ~263 Wh/kg Why This Cell Matters

The NCR21700T (and the 21700 format in general) was the catalyst for moving away from the classic 18650 standard. Energy Density:

By increasing the volume by about 50%, Panasonic managed to nearly double the energy capacity of standard 18650s while only slightly increasing the footprint. Thermal Management: panasonic ncr21700t datasheet

These cells use an NCA (Nickel Cobalt Aluminum) chemistry. While they offer high energy density, they require sophisticated thermal management because they generate significant heat during fast charging. The "Tesla" Connection:

Because they were designed for EVs, they are optimized for high-volume manufacturing and long-cycle life rather than the extreme "raw" discharge power found in high-performance power tool cells. Performance Insights for DIYers If you are using these for flashlights or DIY e-bike packs: Capacity King:

At ~5000mAh, these are among the highest capacity 21700s you can get. Moderate Power:

They are not "high-drain" monsters. If you need >20A continuous for a high-powered vape or heavy-duty tool, a cell like the Molicel P42A is a safer bet. Physical Size: Panasonic NCR21700T is one of the most enigmatic

Be aware that many "NCR21700T" cells sold online may have visible weld marks or lack a standard manufacturer barcode, as they are often salvaged from larger battery packs. Endless Sphere DIY EV Forum Samsung 50E

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

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. shareable post summarizing its datasheet specifications

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

The Panasonic NCR21700T is a high-capacity 21700-format lithium-ion cell commonly used in energy storage, e-bikes, power tools, and high-capacity battery packs. Below is a concise, shareable post summarizing its datasheet specifications, performance characteristics, and usage considerations.