15A (Without temperature cut-off) / 30A+ (With 60°C thermal monitoring) 2. Key Dimensions and Form Factor
Always use a BMS to prevent overcharging, over-discharging, and short circuits.
The Panasonic NCR21700T requires a CC‑CV (Constant Current / Constant Voltage) charging algorithm, which is standard for lithium‑ion cells:
Unlike older 18650 cells, the 21700 format offers roughly 50% more volume , allowing Panasonic to pack nearly double the energy capacity into a footprint that is only marginally larger. Ensure your battery sleds, custom nickel strips, and 3D-printed spacers are rated specifically for 21700 cells, as 18650 hardware will not fit. 3. Charge and Discharge Characteristics Charging Profile
The 5,000 mAh rating is industry-leading for 21700 cells available to the public. At 0.2C (1,000 mA) discharge to 2.5V at 25°C, a fresh cell will deliver at least 5,000 mAh. However, at higher drain (e.g., 10A), expect capacity to drop to ~4,600–4,700 mAh due to internal resistance losses. The datasheet’s “minimum capacity” of 4,900 mAh ensures consistency across production batches. panasonic ncr21700t datasheet
Sub-ohm vaping (requires 30A+), jump starters, or any device exceeding 18A continuous without active cooling.
The “NCR“ prefix in the model name is an important technical indicator. NCR stands for , a cathode chemistry that combines lithium‑nickel‑cobalt‑aluminum (NCA) or lithium‑nickel‑cobalt‑manganese (NCM) formulations. This chemistry delivers:
The mathematical and physical parameters of the Panasonic NCR21700T establish its baseline performance metrics under standard testing conditions ( 25∘C25 raised to the composed with power C 5000 mAh (Typical) / 4900 mAh (Minimum) Nominal Voltage: 3.6V Maximum Charge Voltage: 4.20V ±plus or minus Discharge Cut-off Voltage: 2.50V
| Parameter | Value | |-----------|--------| | Diameter | 21.0 mm ±0.2 mm | | Height | 70.0 mm ±0.3 mm | | Weight (approx.) | 68 g | 15A (Without temperature cut-off) / 30A+ (With 60°C
Due to its moderate continuous discharge rating, the NCR21700T is :
Always ensure you buy from reputable vendors to avoid counterfeit cells, as the popularity of this specific datasheet makes it a frequent target for relabeling lower-tier batteries.
The is a high-performance, cylindrical lithium-ion cell designed for high-drain applications that require both high energy density and substantial power output . Often referred to as a "Tesla-style" cell due to its 21700 form factor, it offers a significant capacity jump over traditional 18650 batteries while maintaining a compact profile for battery packs. Key Specifications at a Glance
| Condition | Temperature | |-----------|-------------| | Charge | 0°C to 45°C | | Discharge | -20°C to 60°C | | Storage (1 month) | -20°C to 50°C | | Storage (1 year) | -20°C to 25°C (recommended 15°C) | Ensure your battery sleds, custom nickel strips, and
For safe and optimal use, the NCR21700T cell must always be paired with a high-quality BMS that enforces safe operating limits—this is crucial for battery longevity and personal safety.
While some variants are rated for 10A continuous use, high-drain versions can sustain 30A continuous and 40A peaks , suitable for brushless motor systems in brands like Makita or Milwaukee.
Because the NCR21700T is an industrial, unprotected cell, it does not feature an integrated electronic Protection Circuit Module (PCM). Safe deployment relies entirely on external systems. Temperature Thresholds 0°C to +45°C Discharge Temperature Range: -20°C to +60°C Storage Temperature Range: -20°C to +50°C Mandatory External Protections
| Test Condition | Datasheet | Measured (avg) | |----------------|-----------|----------------| | Capacity @ 0.2C | 5000 mAh | 5023 mAh | | Capacity @ 10A | Not listed | 4710 mAh | | IR (DC, 50% SoC) | – | 28 mΩ (vs 20 mΩ AC) | | Temp rise @ 15A cont | +35°C | +38°C (ambient 23°C → 61°C) | | Cycle 500 (0.5C) | 70% | 73.5% |