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32140 Sodium-Ion Battery Cell (Layered Oxide) — Rechargeable Na-ion

Low stock: 1 left

$99.00 USD

~~$149.00 USD~~ $99.00 USD

$24.75 each

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Count 4-Pack 20-Pack 48-Pack

The Big-Format Sodium Ion Cell. More Power, Same Safe Chemistry.

10Ah and 30Wh per cell, roughly 8x the capacity of our 18650 sodium-ion cell in a single robust package. Built for EV conversions, e-bikes, jump starters, marine/RV packs, and stationary solar storage.

Quick Specs:

Form Factor	32140 (Ø32.2 mm x 140 mm)
Nominal Voltage	3.0V
Capacity	10,000 mAh (10 Ah)
Energy	30 Wh
Energy Density	≥110 Wh/kg
Max Continuous Discharge	10C (100 A)
Peak Discharge	15C (150 A) pulse
Internal Resistance	≤3 mΩ (AC 1kHz)
Cycle Life	≥2,000 cycles to 80% SOH
Operating Temperature	Charge: -20°C to 70°C / Discharge: -40°C to 60°C
Weight	265 ±5 g
Safety	UN38.3 Passed
Chemistry	Sodium-ion (Layered Oxide)

The 32140 is the large-format cylindrical sodium-ion cell that serious DIY builders have been waiting for. Ideal for EV conversions, e-bikes, car jump starters, marine/RV packs, and stationary solar storage.

Like all sodium-ion chemistry, the 32140 delivers outstanding cold-temperature performance, operates safely with no thermal runaway risk comparable to lithium cobalt chemistries, and is built from abundant, responsibly sourced sodium, making it a genuinely sustainable choice. The layered oxide cathode gives it a higher working voltage and energy density than polyanion (NFPP) or Prussian blue sodium chemistries, while the large 32mm diameter format allows for very low internal resistance (≤3mΩ AC) and high peak discharge rates up to 10C continuous.

These cells have passed UN38.3 safety testing and are shipping-certified. A BMS is always recommended for pack builds. See our spot welding and BMS notes below.

Key Features

Large-Format, High-Capacity Design: At 10Ah per cell, the 32140 dramatically reduces cell count for pack builds compared to 18650-format cells. Fewer welds, fewer connections, simpler BMS wiring.
Extreme Cold-Weather Performance: Rated for discharge down to -40°C, outperforming LFP in freezing conditions. Ideal for off-grid, marine, and northern-climate applications.
High Discharge Rate Capability: Supports 10C continuous (100A) and up to 15C peak, well-suited for jump starters, power tools, and high-draw EV/e-bike applications.
Ultra-Low Internal Resistance: AC impedance ≤3mΩ at 1kHz means minimal heat generation and excellent efficiency even under high load.
Long Cycle Life: Rated for 2,000 to 3,000+ charge/discharge cycles depending on depth of discharge and temperature, significantly extending pack life over lead-acid and many lithium chemistries.
Safer Chemistry: Sodium-ion cells use no lithium cobalt oxide, dramatically lowering flammability risk. The large-format construction also reduces the number of cells in series, simplifying thermal management.
UN38.3 Transport Certified: These cells have passed the international standard for lithium and sodium battery air/ground shipment safety testing.
Sustainable Sodium Technology: Sodium is more abundant and less geopolitically constrained than lithium, offering a lower long-term cost trajectory and a reduced environmental footprint.

Full Product Specifications

Parameter	Value
Cell Format	Cylindrical 32140
Cell Chemistry	Sodium-ion (Layered Oxide)
Nominal Voltage	3.0V
Nominal Capacity	10Ah (0.5C @ 25°C)
Nominal Energy	30Wh
Charge Cut-Off Voltage	3.5V to 4.0V
Discharge Cut-Off Voltage	1.5V to 2.0V
Standard Charge Current	0.5C (5A)
Max Charge Current	3C (30A)
Standard Discharge Current	0.5C (5A)
Max Continuous Discharge	10C (100A)
Peak Discharge (pulse)	15C (150A)
Internal Resistance (AC)	≤3mΩ (1kHz @ 3.2V)
Internal Resistance (DC)	≤10mΩ (2C, 30s @ 3.2V)
Energy Density	≥110 Wh/kg
Volumetric Energy Density	~248 Wh/L
Charging Temperature	-20°C to 70°C
Discharging Temperature	-40°C to 60°C
Storage Temperature	-20°C to 30°C @ 50% SOC
Cell Weight	265 ±5g
Dimensions	Ø32.2 mm x 140 mm
Cycle Life	≥2,000 cycles to 80% SOH
Safety Certification	UN38.3 Passed

Sodium-Ion Chemistry Comparison: Which Format Is Right for You?

Characteristic	18650 (1.3Ah) Layered Oxide	32140 (10Ah) Layered Oxide
Capacity per Cell	1,300 mAh	10,000 mAh (10 Ah)
Nominal Voltage	3.05V	3.0V
Energy per Cell	~4 Wh	30 Wh
Max Discharge Rate	6C	10C continuous / 15C peak
Best For	Small packs, prototyping, flashlights, e-skate	EV, e-bike, jump start, solar storage, marine/RV
Cold Temp Discharge	-40°C	-40°C
Cycle Life	≥1,000 cycles	≥2,000 cycles

Pack Building & Spot Welding Notes

The 32140 is a large-format cell and behaves differently from 18650 cells during spot welding and pack assembly. Always use a BMS (Battery Management System) sized for your pack voltage and max discharge current.

Follow these guidelines for best results:

Use pure nickel strip rated for the current you plan to draw. We recommend 0.1mm or 0.15mm pure nickel strip for most builds. 0.2mm can work but requires significantly more welding power. Double up nickel strips for higher power.
Start with a medium-low power setting on your spot welder. Too much power will damage the cell tabs, too little will produce weak joints. Always test on a scrap cell or spare tab before welding your pack.
Use 2 to 4 spot welds per tab connection for prototype builds. More spots increase joint strength but also increase the risk of overheating the cell. These larger terminals tolerate heat better than 18650 cells, but they still have limits.
After welding, place insulation film (PET or Mylar) between the cells and any nickel strips that cross over cell tops or terminals to prevent short circuits.
Test every connection with a pull-force check before closing up your pack.
Never short-circuit the cells or discharge below 1.5V. Always verify your BMS cutoff settings before the first charge.

Recommended BMS: Use a sodium-ion compatible BMS with a 3.0V nominal cell voltage setting. Most modern multi-chemistry BMS units support sodium-ion. Confirm the charge cutoff can be set between 3.5V to 4.0V and discharge cutoff to 1.5V to 2.0V. Contact us if you need BMS recommendations for your specific build.