Panasonic Ncr21700t Datasheet 【PRO Walkthrough】

The headline says 35A Max discharge. But look at the temperature graph. If you actually pull 35A continuously, the cell will hit (194°F) very quickly.

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| 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. |

The cell utilizes a standard Constant Current / Constant Voltage (CC/CV) charging profile. panasonic ncr21700t datasheet

The cell features a (flat‑top), which makes it compatible with most device holders and battery compartments designed for 21700 cells. Note that flat‑top cells may not make contact in some devices designed specifically for button‑top cells; users should verify compatibility before use.

Before diving into the nuances, here are the core electrical and mechanical specifications that define the NCR21700T.

Understanding the behavior of the NCR21700T under load is vital for designing robust power electronics. The headline says 35A Max discharge

A notable aspect of the is its scarcity as a standalone retail product. Industrial users note that "NCR21700T" is often a label used for cells salvaged from Tesla Model 3 packs. These cells may lack standard barcodes or retail wraps, frequently appearing as bare cans with visible wire-bond removals. Genuine cells are often sourced through specialty retailers like Daraz or AliExpress . NCR21700 data sheet

The Panasonic NCR21700T represents a high‑quality lithium‑ion cell that effectively balances capacity with moderate discharge capability. Its primary value proposition is in applications that prioritize runtime over raw power output. However, prospective users must carefully consider:

Residential solar storage banks and uninterruptible power supplies (UPS) use these cells to achieve long-term reliability and a compact storage footprint. This public link is valid for 7 days

4,800 mAh (typical) / 4,700 mAh (minimum). Nominal Voltage: 3.6V. Charging Voltage: 4.2V ± 0.03V. Standard Charging Current: 1,410 mA (0.3C).

The NCR21700T is characterized by a flat discharge curve, typical of NCA chemistry.

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.

The datasheet typically rates cycle life based on standard conditions (25°C, 0.5C charge/discharge). For the NCR21700T:

These numbers confirm the NCR21700T as a cell. It is not a “high current” cell like the Samsung 40T (35A), but it excels in applications requiring long runtime with moderate power bursts.