Panasonic cells are legendary for their chemistry stability. Under standard operating conditions (0.5C charge, 1C discharge, at 25°C), the NCR21700T datasheet projects:
The NCR21700T is a cylindrical lithium-ion cell utilizing the 21700 form factor (21 mm diameter, 70 mm length). Developed by Panasonic, a pioneer in battery technology, this cell features a Nickel Cobalt Aluminium Oxide (NCA) chemistry. This specific formulation allows the battery to achieve high capacity while maintaining a stable thermal profile. Key Highlights:
High-end, high-lumen tactical flashlights use 21700 form factors to replace older 18650 standards. Mandatory Battery Management System (BMS) Requirements
The balance of high capacity and solid high-current capability makes the NCR21700T highly versatile across multiple demanding industries:
The Panasonic NCR21700T requires a CC‑CV (Constant Current / Constant Voltage) charging algorithm, which is standard for lithium‑ion cells: panasonic ncr21700t datasheet
This comprehensive guide breaks down the Panasonic NCR21700T datasheet, exploring its core specifications, performance curves, safety features, and ideal use cases. 1. Overview and Key Features
| Use Case | Verdict | Reason | |----------|---------|--------| | Solar lights / backup power | ✅ Excellent | Low drain, long cycle life, low self-discharge. | | Laptop battery packs | ✅ Good | 4.2V standard, 4800 mAh ideal for 2-3 cell designs. | | Portable power banks | ✅ Very good | High energy density, moderate charge/discharge fits USB-C PD 45W. | | E-bike / power tools | ❌ No | 9.6A max = <500W peak. Will overheat or trip BMS. | | Vaping | ❌ Dangerous | Exceeds 2C pulse rating. Risk of venting. | | EV conversion (small) | ⚠️ Marginal | Only for low-power (e.g., electric wheelchair), not scooters. |
E-bikes, electric scooters, and light electric vehicles.
Avoid storing or discharging the cell in environments exceeding 45°C. Panasonic cells are legendary for their chemistry stability
Constant Current / Constant Voltage (CC/CV).
To safely replenish the NCR21700T while maximizing its life span, a standard Constant Current / Constant Voltage (CC/CV) profile must be followed.
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:
What is the required by your application? This specific formulation allows the battery to achieve
Safety and longevity depend heavily on staying within these thermal windows. 10°C to 45°C Discharging: -20°C to 60°C Storage (1 year): -20°C to 20°C Energy Density: ~263 Wh/kg (Gravimetric) 🛠️ Key Performance Features
Among their lineup, the stands out as a high-capacity cell designed for applications requiring long runtimes and moderate power delivery. This article provides a deep dive into the datasheet specifications, interpreting what the numbers mean for engineers and battery pack designers.
Never carry loose cells in a pocket; always use a plastic case to prevent short circuits. If you are designing a project with these, I can help you: