Laptop power banks and solar storage solutions. Medical Equipment: High-energy, reliable power source. Panasonic NCR21700T
Many vapers and flashlight modders run this cell at 30A+ in pulses. The datasheet is clear: . Push it to 20A, and you will see the surface temperature rise from 25°C ambient to over 80°C within 2 minutes. At 85°C, the separator inside the cell begins to degrade, leading to thermal runaway.
3.6V (consistent across discharge cycles for modern brushless motors).
For detailed technical drawings or verification, you can view the Panasonic NCR21700 Datasheet or check updated safety data via Panasonic Energy Downloads .
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Optimized for steady currents up to 10A to 15A without active cooling.
The search query usually comes from one of three user groups:
Running any cell at high currents generates heat, which is the biggest enemy of battery longevity and safety. The NCR21700T is designed to manage this heat effectively.
Due to its high energy density and robust discharge profile, the Panasonic NCR21700T is frequently selected for: Electric vehicles (EVs) and E-bikes Cordless power tools Energy Storage Systems (ESS) High-end portable flashlights and vaping hardware Industrial automation and robotics Laptop power banks and solar storage solutions
Safety is paramount when working with any high-energy lithium-ion cell. The NCR21700T is no exception, and unfortunately, its popularity has led to a flood of counterfeit cells, particularly on online marketplaces like AliExpress.
20A–30A continuous (with short peaks up to 40A) Standard Charge: 2.0A–2.5A (CC-CV) Internal Resistance: ≤14mΩ Thermal & Environmental Performance
Safety recommendations (practical):
If you already own these cells and want to push them safely, follow these thermal management rules derived from the datasheet: The datasheet is clear:
The is currently one of the most talked-about lithium-ion cells in the DIY battery building, electric vehicle (EV), and high-drain electronics communities . While standard 21700 battery cells have largely eclipsed the older 18650 form factor due to their massive 42% capacity increase , the NCR21700T variant has sparked intense demand—and confusion—online.
Operating consistently at high temperatures (above 60°C) reduces the total capacity available during that cycle and significantly accelerates the degradation of the cell, reducing its total cycle life. 3. Ideal Applications for the NCR21700T
The Panasonic NCR21700T remains a top-tier choice, a true workhorse that continues to power the future of portable energy. Always build safe packs, and harness this "hot" power responsibly.