1800 mAh 18650 Cylindrical Sodium-Ion Cell – 4 Pack | ATOMFAIRProduct Type: Sodium-ion battery product
Sodium-ion battery product
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BATTERY PROCUREMENT SUPPORT
For model selection, system matching or configuration confirmation, contact our technical sales team.
E-MAIL: inquiry@atomfair.com
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Supplier: Atomfair
Brand: ATOMFAIR®
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Operate the cell within the specified charging voltage of 4.2V and discharge ending voltage of 2.0V to prevent damage. Limit continuous discharge current to 1.8A and pulse discharge to 3.6A to prevent overcurrent stress.
- Voltage Limits: Do not exceed 4.2V charging voltage or discharge below 2.0V.
- Current Limits: Continuous discharge must not exceed 1.8A and pulse discharge must not exceed 3.6A.
- Charging Rate: Use standard 0.5C charging current for optimal cycle life.
Confirm the cell's specifications match your application requirements before integration. Review voltage and current limits to ensure safe operation.
Required Equipment:
- Confirm Application
Confirm the cell model, quantity, and intended device or battery-pack application. - Review Specifications
Review the charging cut-off voltage, discharge cut-off voltage, current limits, temperature, and resistance requirements. - Match Dimensions and Protection
Match the cell dimensions, terminal arrangement, protection circuit, and charger limits with the finished pack. - Provide Order Information
Include target capacity, quantity, charger specification, discharge profile, and pack assembly requirements in the order.
What is the internal resistance and maximum pulse discharge current of the Atomfair AF-CY-1800D 18650 sodium-ion cell?
The internal resistance is ≤60 mOhm measured at 650 Hz AC impedance. The maximum pulse discharge current is 3.6 A, which is double the maximum continuous discharge current of 1.8 A. These parameters are critical for evaluating power delivery, heat generation, and battery management system design.
What charging voltage and current profile is recommended for the 1800 mAh 18650 sodium-ion cell?
The cell requires a charging cut-off voltage of 4.2 V ±0.05 V and a standard charging current of 0.5C (900 mA). The discharge ending voltage is 2.0 V ±0.05 V. Chargers must be configured to these parameters to avoid overcharge or undercharge conditions.
What are the physical dimensions and weight of the 18650 sodium-ion cell for battery pack integration?
The cell has a maximum height of 65.1 mm, a maximum diameter of 18.4 mm, and a weight of ≤45 g. These dimensions conform to the standard 18650 form factor, allowing integration into existing battery pack designs provided voltage and current limits are matched.
This 1800 mAh 18650 sodium-ion cell offers a 3.0 V nominal voltage with a 4.2 V charging cut-off, providing a drop-in compatible form factor for lithium-ion battery pack designs, but requires careful current management due to a 1.8 A maximum continuous discharge limit and a 60 mOhm internal resistance that impacts high-rate applications.
Positive
- Drop-in 18650 form factor: The cell's 18.4 mm diameter and 65.1 mm height match standard 18650 dimensions, enabling direct mechanical integration into existing battery pack housings and holders designed for lithium-ion cells.
- Sodium-ion chemistry safety margin: With a 3.0 V nominal voltage and 2.0 V discharge cutoff, this sodium-ion cell provides a wider voltage tolerance at low state-of-charge compared to lithium cobalt oxide cells, reducing risk of deep discharge damage in series configurations.
Trade-offs
- Limited continuous discharge rate: The maximum continuous discharge current of 1.8 A (1C) restricts use to low-to-moderate power applications; devices requiring sustained currents above this threshold will trigger the cell's protection or cause voltage sag.
- High internal resistance constraint: An internal resistance of up to 60 mOhm at 650 Hz AC impedance increases ohmic heating under load and reduces energy efficiency, particularly during pulse discharge events up to 3.6 A.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
