3S 4S 1.2A Active Balancer for Lithium Battery Price in Bangladesh

The 3S 4S 1.2A Active Balancer for Lithium Battery is an energy-transfer balancing module designed to help maintain more consistent voltage levels between cells in 3S and 4S lithium battery packs. It can be used with compatible lithium-ion and LiFePO4 battery configurations where differences in individual cell voltage need to be reduced. Active balancers are particularly useful in multi-cell battery packs because cells connected in series do not always remain at exactly the same voltage during charging, discharging, and long-term use.

A series battery pack combines multiple cells to obtain a higher overall voltage. For example, a typical 3S Li-ion pack has three cells or cell groups connected in series, while a 4S pack has four. Although the total pack voltage is the sum of the individual cell voltages, each cell still needs to remain within its appropriate operating range. Differences between cells can gradually become more noticeable as the battery is repeatedly charged and discharged.

The purpose of an active balancer is to redistribute energy between cells instead of simply dissipating excess energy as heat. This makes active balancing different from conventional passive balancing circuits. Active balancing modules use energy-transfer circuitry to move charge from a relatively higher-voltage cell toward a relatively lower-voltage cell, helping reduce voltage differences across the pack.

This 1.2A active balancer is suitable for 3S and 4S configurations, depending on the selected version. Product listings for this type of module specify a maximum balancing current of approximately 1.2A, while the actual balancing current varies according to the voltage difference between cells. As the cells become more closely balanced, the balancing current generally decreases.

The module can be useful when building or maintaining battery packs for portable power systems, robotics, backup power equipment, solar applications, electric projects, and other electronics applications. It is especially useful when a battery pack contains cells with slightly different states of charge or when cell imbalance develops during repeated operation.

An important point is that an active balancer is not necessarily a complete BMS. A balancer primarily performs cell-voltage equalization. It should not automatically be considered a substitute for a proper BMS providing overcharge, over-discharge, over-current, short-circuit, and other protection functions. For a complete battery system, the appropriate BMS and charger should be selected separately according to the battery chemistry and series configuration.

The 3S/4S 1.2A Active Balancer is therefore best viewed as an additional battery-management component that can work alongside an appropriate BMS. When correctly installed, it can help maintain a more uniform cell voltage profile and improve the usable consistency of a multi-cell battery pack.

What is an Active Battery Balancer?

An active battery balancer is an electronic circuit that transfers energy between cells in a series-connected battery pack.

Instead of converting excess cell energy into heat like a passive balancing circuit, an active balancer transfers energy from cells with relatively higher voltage toward cells with relatively lower voltage. This energy-transfer approach can improve balancing efficiency and reduce unnecessary energy loss.

Active balancing is particularly useful in multi-cell lithium battery packs where cell voltage differences can affect pack performance.

Key Features of 3S 4S 1.2A Active Balancer for Lithium Battery

• Supports 3S and 4S battery configurations
• Up to 1.2A balancing current
• Active energy-transfer balancing
• Designed for lithium battery packs
• Compatible with suitable Li-ion configurations
• Compatible with suitable LiFePO4 configurations
• Helps reduce cell voltage differences
• Improves voltage consistency between series cells
• Compact PCB design
• Suitable for DIY battery packs
• Can complement an appropriate BMS
• Useful for rechargeable battery systems
• Energy-transfer balancing instead of simple resistive discharge
• Suitable for battery maintenance and pack development
• Practical for electronics and power projects

Technical Specifications

• Product Type: Active Battery Balancer / Equalizer
• Model: 3S / 4S 1.2A
• Supported Configuration: 3S and 4S
• Maximum Balancing Current: 1.2A
• Balancing Method: Active Energy Transfer
• Battery Chemistry: Li-ion / LiFePO4
• Application: Series-Connected Lithium Battery Packs
• Function: Cell Voltage Equalization
• Installation: Connected across individual cells/cell groups
• Application: DIY Battery Pack, Energy Storage, Portable Power and Electronics

Some versions of this type of product specify an operating range around 2.0V–4.5V per cell, but exact thresholds can vary by board version. Always verify the specifications and markings of the particular module before installation.

Working Principle of 3S 4S 1.2A Active Balancer for Lithium Battery

The active balancer monitors the voltage of the individual cells or cell groups connected in series. When a significant voltage difference exists, the circuit transfers energy from a relatively higher-voltage section toward a lower-voltage section.

For example, if one cell group has a higher voltage than another, the active balancing circuit can redistribute part of the stored energy toward the lower-voltage cell group. This reduces the difference between the cells without simply converting the excess energy into heat.

The balancing current depends on the voltage difference between cells. Some versions of this 1.2A class of balancer specify lower current when the voltage difference is small and higher current as the difference increases, up to the module’s rated maximum.

Once the cells become more closely matched, the balancing activity decreases. This allows the module to continuously work toward maintaining a more uniform voltage condition across the battery pack.

Applications of 3S 4S 1.2A Active Balancer for Lithium Battery

• 3S Li-ion battery packs
• 4S Li-ion battery packs
• 3S LiFePO4 battery packs
• 4S LiFePO4 battery packs
• DIY rechargeable battery systems
• Portable power systems
• Solar energy storage projects
• Robotics battery packs
• RC electronics
• Backup power systems
• DIY UPS projects
• Electric equipment
• Battery pack prototyping
• Engineering projects
• Educational battery-management projects

Advantages of 3S 4S 1.2A Active Balancer for Lithium Battery

• Active energy transfer
• Helps reduce cell voltage imbalance
• Better energy utilization than simple resistive balancing
• Suitable for multiple lithium battery chemistries
• Supports both 3S and 4S versions
• Compact and lightweight
• Useful alongside a compatible BMS
• Helps improve cell voltage consistency
• Suitable for DIY battery pack construction
• Practical for rechargeable energy-storage applications

Limitations

• It is an active balancer, not necessarily a complete BMS.
• It does not automatically replace over-current, short-circuit, or other battery protection circuitry.
• The exact operating voltage range depends on the specific version.
• It must be matched to the correct 3S or 4S configuration.
• Incorrect wiring can damage the module or battery cells.
• Balancing performance depends on the voltage difference and condition of the cells.
• Cells in a pack should be appropriately matched for capacity and condition.

Installation / Usage Tips

• Select the correct 3S or 4S version for your battery pack.
• Confirm the battery chemistry before installation.
• Match the balancer to the individual cell voltage range.
• Connect each balance wire to the correct cell or cell-group junction.
• Double-check polarity before powering the circuit.
• Use cells with similar capacity and condition.
• Do not connect a 4S balancer to a 3S pack or vice versa.
• Use a compatible BMS for complete battery protection.
• Use a charger specifically designed for the battery chemistry and series count.
• Insulate exposed connections to prevent accidental short circuits.
• Verify individual cell voltages before connecting the balancer.
• Do not use physically damaged or compromised battery cells.

Why Choose 3S 4S 1.2A Active Balancer for Lithium Battery

The 3S 4S 1.2A Active Balancer is a practical solution for improving voltage consistency in multi-cell lithium battery packs. Its energy-transfer balancing method helps redistribute charge between cells rather than simply wasting excess energy as heat.

For DIY battery builders, engineers, technicians, and electronics enthusiasts, it provides an economical way to add active cell equalization to a compatible 3S or 4S battery system. It is particularly useful when maintaining consistent cell voltage is important for the reliable operation of a series-connected battery pack.

Why Buy from Electroxbd

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

Frequently Asked Questions (FAQ)

What is the 3S 4S 1.2A Active Balancer used for?

It is used to equalize voltage differences between cells in 3S and 4S Li-ion or LiFePO4 battery packs through active energy transfer.

What does 1.2A mean in this active balancer?

The 1.2A rating refers to the maximum specified balancing current. The actual current can vary depending on the voltage difference between the cells.

Can this active balancer be used with LiFePO4 batteries?

Yes, compatible versions are designed for LiFePO4 as well as Li-ion battery packs, provided the cell voltage range and series configuration match the module.

Is an active balancer the same as a BMS?

No. An active balancer primarily equalizes cell voltages. A complete BMS may provide additional functions such as overcharge, over-discharge, over-current, and short-circuit protection.

Where can I buy 3S 4S 1.2A Active Balancer in Bangladesh?

You can buy the 3S 4S 1.2A Active Balancer for Lithium Battery from Electroxbd, a trusted electronics components supplier in Bangladesh.

Common Questions:

Q: What is the price of 3S 4S 1.2A Active Balancer for Lithium Battery in Bangladesh?

A: The latest price of 3S 4S 1.2A Active Balancer for Lithium Battery in Bangladesh is 270 BDT.

Q: Where to buy 3S 4S 1.2A Active Balancer for Lithium Battery in Bangladesh?

A: You can buy the 3S 4S 1.2A Active Balancer for Lithium Battery at the best price from ElectroXBD in Bangladesh.