Panasonic Ncr21700t: Datasheet ~upd~

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

The cell meets or exceeds all primary specs. The only minor discrepancy was higher DC internal resistance (common, as AC IR is always lower).

The Panasonic NCR21700T is suitable for a wide range of applications, including: panasonic ncr21700t datasheet

NCR Chemistry: Utilizing Nickel-Cobalt-Aluminum (NCA) chemistry, it achieves high energy density (~263 Wh/kg) while maintaining the stability required for long-term cycling.

Lifecycle, aging mechanisms and mitigation

Aging drivers: cycle count, depth of discharge, high SOC dwell, high temperature, and high C‑rates accelerate SEI growth, lithium plating, and electrode structural degradation.
Mitigation: reduced max SOC, partial state‑of‑charge cycling, temperature control, gentler charge/discharge currents, and avoiding long dwell at high temperature extend usable life.
End‑of‑life criteria: typical practice is 70–80% of original capacity as a conservative threshold for retirement or repurposing.

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7. Recommended Application Use Cases

Given its high capacity (4800 mAh) and moderate discharge capability, this cell is best suited for:

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"? Aging drivers: cycle count, depth of discharge, high

The following technical specifications are derived from available datasheet summaries and product listings: Parameter Specification Nominal Capacity 4,800 mAh – 5,000 mAh Nominal Voltage 3.6V – 3.7V Max. Charging Voltage Discharge Cut-off Voltage Max. Continuous Discharge 30A (Peak up to 40A) Standard Charging Current 2.4A – 2.5A Cycle Life >1,000 cycles Weight ~66.8g – 70g Dimensions 21.1mm (Dia) x 70.4mm (H) Design and Chemistry