Summary of Battery Sodium 3V 26700 3500mAh

The 3V 26700 3500mAh Sodium-Ion Battery Cell is engineered for high-performance energy storage with high energy density, long cycle life exceeding 4000 cycles, stable high-rate charge/discharge (3C), and safe operation even in extreme temperatures down to -30°C. With excellent thermal stability and customizable pack options (voltage, capacity, size, OEM branding, connectors, and packaging), this sodium-ion cell offers a next-generation alternative to traditional lithium-ion technology.

Sodium-ion Batteries​ 26700 3500mAh​ Specification

Model: 26700 batterie sodium-ion​

Rated Capacity: 3500mAh

Minimum Capacity: 3450mAh

Rated voltage: 3V

Energy: 10.5Wh

Energy Density: 128Wh/kg

Discharge Cut-off Voltage: 2V

Charge Cut-off Voltage: 3.9V

Cycle Life: More than 4000 cycles

Dimensions: Φ26*70mm

Weight: 82g

Internal Resistance: Less than 14mΩ

Standard Discharge Current: 0.2C (700mAh)

Standard Charge Current: 0.2C (700mAh)

Max Continuous Discharge Rate: 3C (10.5A)

Max Continuous Charge Current: 1C (3.5A)

Charging Temperature: -10 to 55℃;

Discharge Temperature: -30 to 60℃

Storage Temperature:

• -20℃~25℃: 12 months
• 25℃~45℃: 3 months
• 45℃~60 ℃: 1 month

Key Features

High Energy Density

The 26700 sodium-ion battery delivers 3500mAh capacity at 3V nominal voltage, providing excellent energy storage efficiency. Its energy density rivals mainstream lithium-ion cells while offering more stable performance in demanding applications.

Long Cycle Life (4000+ Cycles)

With over 4000 charge-discharge cycles and still maintaining 80% capacity retention, this battery is designed for reliability and sustainability, reducing replacement frequency and total cost of ownership.

High-Rate Charge & Discharge

The cell supports up to 3C charging and discharging, enabling faster energy transfer without compromising performance. This makes it suitable for power tools, electric mobility, and high-demand energy storage systems.

Excellent Low-Temperature Performance

Unlike conventional lithium-ion batteries, this sodium-ion cell supports stable discharge at -30°C, ensuring reliable power delivery in harsh winter conditions and outdoor environments.

Superior Safety & Thermal Stability

Compared to lithium-ion batteries, sodium-ion technology provides better thermal stability and reduced fire/explosion risks, making it a safer choice for consumer electronics, industrial devices, and energy storage.

Customizable Battery Packs

We offer OEM & ODM customization including:

• Dimensions, voltage, and capacity combinations

• OEM labeling, barcodes, sleeves, and packaging

• Custom connectors and plug types

• Pack assembly for 3V, 12V, 24V, 48V systems and beyond

Different Model Sodium-Ion Batteries

❓ FAQ – 26700 3500mAh Sodium Battery

1. How does sodium-ion compare to lithium-ion batteries?

Sodium-ion batteries offer better thermal stability, lower fire risks, and excellent low-temperature discharge, making them safer and more versatile in extreme environments.

2. Can this 26700 cell be used in custom battery packs?

Yes, Cestpower supports full customization including voltage, capacity, size, OEM branding, and connectors.

3. What is the typical cycle life of the 3V 26700 3500mAh sodium-ion cell?

It maintains over 80% capacity after 4000 cycles, outperforming many lithium-ion counterparts.

4. Is the 3V 26700 3500mAh cell suitable for fast charge & discharge?

Yes, it supports up to 1C charge and 3C discharge rates, ideal for applications requiring rapid power delivery.

5. Who makes sodium ion batteries?

Cestpower is the manufacturer of sodium ion batteries in China, including 18650, 26700, 32140 models, feel free to contact us.

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