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.
If you exceed 35A (say, a dead short or a mod malfunction pushing 50A), the internal separator melts. This causes an internal short circuit. That heat, combined with the NCA chemistry, leads to "venting with flame." panasonic ncr21700t datasheet hot
If you’ve landed on this page searching for the , you aren’t just looking for voltage and capacity. You want the real data. You want the thermal performance, the internal resistance under load, and the truth about whether this 21700 cell can handle high-drain applications without turning your device into a hand warmer. The NCR21700T runs hotter than the Samsung 40T
The is a high-performance lithium-ion cell widely recognized for its "Tesla-grade" energy density and high current capabilities. While official public datasheets can vary by OEM partner, the following technical write-up summarizes the core specifications and critical thermal handling requirements. Core Specifications While the datasheet claims <18mΩ, real-world DC internal
The NCR21700T balances high energy density with significant current output. Below are the verified technical specifications from the Panasonic Industrial datasheet and reputable technical suppliers. Detail Reference Model Name Form Factor 21700 (21mm x 70.3mm) Nominal Capacity 4800mAh (Rated) / 5000mAh (Typical) Nominal Voltage 3.6V – 3.7V Max. Charge Voltage Max. Continuous Discharge 30A (Recommended Max) Pulse/Peak Discharge Standard Charge Current 2500mA (0.5C approx.) Cell Weight ~65g - 67g Cycle Life >500 cycles (to 80% capacity) Thermal & Operational Characteristics
While the cell is designed for high-drain use, continuous operation at its maximum current (40A) can generate significant internal heat. Many expert guides recommend a more conservative continuous discharge to prevent thermal throttling. Key Advantages Panasonic Lithium Batteries Handbook