SunPower 5000mAh INR21700 Li-ion Battery Price in Bangladesh

The SunPower 5000mAh INR21700 Li-ion Battery is a high-capacity cylindrical rechargeable lithium-ion cell designed for applications that require dependable energy storage in a compact format. With a 21700 form factor, approximately 3.7V nominal voltage, and an advertised 5000mAh capacity, this battery is suitable for a wide range of compatible electronics, portable power systems, battery packs, robotics projects, power equipment, and DIY energy-storage applications.

The 21700 battery format has become increasingly popular as an alternative to the older 18650 format. A 21700 cell is physically larger than an 18650 cell, allowing manufacturers to accommodate more active material inside the cylindrical housing. As a result, 21700 batteries can offer higher capacity while maintaining a convenient cylindrical form factor.

The 5000mAh capacity is one of the key features of this SunPower cell. Capacity indicates the amount of electrical charge that the battery can store under specified testing conditions. A 5000mAh rating means the cell is designed to provide approximately 5000mAh under the manufacturer’s specified test conditions. Actual usable capacity depends on factors such as discharge current, temperature, cutoff voltage, battery age, and testing methodology.

The cell uses INR lithium-ion chemistry, a commonly used family of lithium-ion cells associated with nickel-containing cathode formulations. However, exact electrochemical characteristics, maximum continuous discharge current, charge current, and cutoff specifications can vary by manufacturer and specific cell model. For applications requiring high current, users should always verify the exact specifications of the particular SunPower cell.

With a nominal voltage of approximately 3.7V, the cell is compatible with many systems designed around standard single-cell lithium-ion batteries. However, lithium-ion cells do not remain at exactly 3.7V during operation. Their voltage changes according to state of charge, load, temperature, and internal resistance.

For higher-voltage applications, multiple 21700 cells can be connected in series. For greater capacity and current capability, cells can be connected in parallel. For example, a properly designed 4S battery pack uses four cell groups in series to provide a substantially higher nominal voltage than a single cell. Combining series and parallel arrangements can create larger battery packs for portable power and energy-storage applications.

When assembling multi-cell battery packs, it is important to use cells with matching specifications and similar condition. A suitable BMS should be selected according to the battery chemistry and series configuration. The BMS can provide functions such as cell monitoring and protection, depending on the selected model.

The 21700 format is also useful because it offers a relatively high energy-storage capacity without requiring extremely large physical dimensions. This makes it attractive for applications where both runtime and compactness are important.

The SunPower 5000mAh INR21700 can be considered for compatible portable electronics, battery-powered tools, robotics, lighting systems, backup power, power stations, and experimental battery projects. It can also be useful as a building block for custom battery packs where the electrical characteristics of the cell match the requirements of the application.

Before purchasing for a high-current application, however, users should verify the cell’s maximum continuous discharge current and other electrical specifications. Capacity alone does not determine whether a cell is suitable for a high-current load.

Overall, the SunPower 5000mAh INR21700 Li-ion Battery provides a high-capacity cylindrical lithium-ion format for users looking for more energy storage than a typical 18650 cell can provide in a single cell.

What is an INR21700 Battery?

An INR21700 battery is a rechargeable lithium-ion cylindrical cell based on the 21700 physical format.

The “21700” designation generally refers to the approximate physical dimensions of the cell:

• Approximately 21mm diameter
• Approximately 70mm length

The INR designation identifies the lithium-ion chemistry family rather than the physical size.

Compared with many 18650 cells, the 21700 format provides more internal volume and can therefore accommodate higher-capacity designs.

Key Features of SunPower 5000mAh INR21700 Battery

• 5000mAh advertised capacity
• 3.7V nominal voltage
• Standard 21700 cylindrical format
• Rechargeable lithium-ion chemistry
• INR chemistry designation
• High energy-storage capacity
• Suitable for compatible battery holders
• Suitable for custom battery-pack construction
• Useful for portable power systems
• Suitable for robotics projects
• Useful for power-tool battery packs where specifications match
• Suitable for DIY electronics projects
• Can be configured in series or parallel
• Compact cylindrical construction
• Useful for energy-storage applications

Technical Specifications

• Product Name: SunPower 5000mAh INR21700 Li-ion Battery
• Brand: SunPower
• Battery Type: Rechargeable Lithium-Ion
• Model: INR21700
• Nominal Voltage: 3.7V
• Rated Capacity: 5000mAh
• Energy: Approximately 18.5Wh at nominal voltage
• Cell Format: 21700
• Shape: Cylindrical
• Chemistry: INR Li-ion
• Rechargeable: Yes
• Application: Compatible Electronics, Battery Packs and Portable Power

Important: Maximum continuous discharge current, recommended charging current, charging voltage, cutoff voltage, internal resistance, dimensions, weight, and terminal configuration should be verified against the exact SunPower cell specification before use. These parameters are particularly important for high-current applications.

Working Principle of SunPower INR21700 Li-ion Battery

The SunPower INR21700 stores energy through reversible electrochemical reactions inside the lithium-ion cell.

During charging, electrical energy from a compatible lithium-ion charger drives lithium ions through the cell’s electrochemical structure. During discharge, the stored chemical energy is converted into electrical energy that can power the connected load.

The battery provides a nominal voltage of approximately 3.7V, but its actual terminal voltage changes throughout the charge and discharge cycle.

The amount of current the cell can deliver depends on its construction, internal resistance, temperature, state of charge, and manufacturer specifications.

Because lithium-ion cells require controlled charging, the SunPower 21700 should always be used with a charger or battery-management system designed for the correct lithium-ion chemistry and configuration.

Applications of SunPower 5000mAh INR21700 Battery

• DIY lithium-ion battery packs
• Portable power systems
• Power banks
• Robotics projects
• Electric mobility projects
• Compatible power-tool battery packs
• Rechargeable lighting systems
• Portable electronics
• Backup power systems
• Solar energy-storage projects
• IoT and embedded projects
• Battery-powered instruments
• RC projects
• Engineering prototypes
• Educational electronics projects
• Custom energy-storage systems

Advantages of SunPower 5000mAh INR21700 Battery

• High 5000mAh advertised capacity
• Larger energy storage than many conventional 18650 cells
• Standardized 21700 form factor
• Rechargeable lithium-ion chemistry
• Suitable for single-cell and multi-cell applications
• Useful for custom battery packs
• Good energy density
• Compact cylindrical construction
• Suitable for portable power applications
• Flexible series and parallel configuration
• Useful for electronics and engineering projects

Limitations

• Requires a suitable lithium-ion charger.
• Maximum discharge current must be verified before high-current use.
• A bare cell does not automatically include a BMS or protection circuit.
• Multi-cell packs require appropriate protection and balancing.
• Actual capacity varies with load, temperature, and test conditions.
• The cell should not be used outside its specified voltage and current limits.
• 21700 cells are physically larger than 18650 cells and require compatible holders or pack dimensions.

Installation / Usage Tips

• Use only equipment designed for 21700 lithium-ion cells.
• Confirm the battery polarity before installation.
• Use a charger designed for the correct Li-ion chemistry.
• Do not exceed the manufacturer’s specified charging voltage.
• Verify the maximum discharge current before connecting a high-current load.
• For multi-cell packs, use cells with matching specifications and similar condition.
• Use a suitable BMS for series-connected battery packs.
• Select the BMS according to the number of series cells and battery chemistry.
• Do not short-circuit the cell.
• Keep the battery away from excessive heat.
• Do not use a swollen, damaged, leaking, or physically compromised cell.
• Use suitable insulation and mechanical protection when assembling battery packs.
• Test a newly assembled battery pack carefully before connecting a high-power load.

Why Choose SunPower 5000mAh INR21700 Li-ion Battery?

The SunPower 5000mAh INR21700 Li-ion Battery is an attractive option when a project requires higher capacity from an individual cylindrical cell. Its 21700 format offers greater physical volume than the traditional 18650 format, while the advertised 5000mAh capacity provides substantial energy storage in a single cell.

For battery-pack builders, robotics enthusiasts, engineers, technicians, and DIY electronics users, the cell can be incorporated into appropriately designed battery systems where its voltage, capacity, discharge characteristics, and physical dimensions meet the project requirements.

Its combination of 21700 format, 5000mAh capacity, and 3.7V nominal voltage makes it suitable for a broad range of rechargeable power applications.

Why Buy from Electroxbd?

• 100% Quality Tested Products
• Trusted Source for Reliable Electronic Parts
• Fast Delivery Across Bangladesh
• Competitive Pricing
• Quality Rechargeable Batteries
• Dedicated Technical Support
• Suitable for DIY Battery Pack Builders
• Ideal for Students, Engineers, Technicians and Makers
• Nationwide Delivery Across Bangladesh

Frequently Asked Questions (FAQ)

What is the capacity of the SunPower INR21700 battery?

The advertised capacity is 5000mAh.

What is the nominal voltage of this 21700 battery?

The nominal voltage is approximately 3.7V, which is typical for rechargeable lithium-ion cells.

What is the difference between 21700 and 18650 batteries?

A 21700 cell is physically larger than an 18650 cell. The additional internal volume can allow a 21700 battery to provide higher capacity in a single cell, although the exact performance depends on the cell design.

Can SunPower 21700 cells be used to build a battery pack?

Yes. Compatible cells can be connected in series, parallel, or a series-parallel configuration to create a larger battery pack. A suitable BMS and charger should be selected according to the final configuration.

Is the SunPower 5000mAh INR21700 suitable for high-current applications?

Capacity alone does not determine high-current suitability. The cell’s maximum continuous discharge-current rating should be verified before using it with a high-current load.

Where can I buy SunPower 5000mAh INR21700 Li-ion Battery in Bangladesh?

You can buy the SunPower 5000mAh INR21700 Li-ion Battery from Electroxbd, a trusted supplier of electronic components and rechargeable batteries in Bangladesh.