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The Panasonic NCR21700T is a high-performance, industrial-grade lithium-ion cell. It stands out in the 21700 form factor market for balancing high capacity with reliable discharge rates.
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.
German battery forum discussions note that while the cell can theoretically handle 30 A discharge currents, the usable energy drops significantly when discharged at higher rates, particularly if the cut鈥憃ff voltage is set above 3.0 V. In other words, the cell is high鈥慶apacity but not truly high鈥憄ower; pushing it beyond its rated continuous current will result in diminished performance and potentially reduced service life.
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. panasonic ncr21700t datasheet
With a high capacity of , the Panasonic NCR21700T significantly outperforms older cells like the NCR18650B (3350mAh) , offering up to 49% more energy per cell . It has an internal resistance of just 11-15m惟 , enabling highly efficient power delivery with minimal energy loss as heat. The NCR21700T also has a low self-discharge rate , retaining most of its charge even after long periods of storage.
The high capacity makes it ideal as a power source for mobile chargers.
of its initial capacity after 300 to 500 full cycles. To significantly extend this cycle life (to 1,000+ cycles), users can implement conservative charging protocols: Limit upper voltage to instead of Below is a concise, shareable post summarizing its
The 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
High-lumen tactical and diving flashlights requiring high current. Safety and Handling Guidelines
Due to its moderate continuous discharge rating, the NCR21700T is : The Panasonic NCR21700T is a 21mm x 70mm
Stop charging when the current tapers off to a specified cut-off threshold, typically
High discharge capability supports high-drain motor requirements.
Low internal resistance keeps operating temperatures down and improves power delivery efficiency. Cycle Life Expectancy
Cordless drills, saws, and grinders require the cell's sustained 15A capability.
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