4S 5A Active Battery Balancer for Lithium Battery

Order your 4S 5A active battery balancer today and give your lithium battery pack the reliable protection it deserves. This cost-effective active balancer, compatible with both LiPo and lithium-iron batteries, actively redistributes energy between cells with 5A balancing current to maintain consistent voltage, maximize capacity, and significantly extend your battery pack's lifespan. Whether you're building a DIY power system, upgrading your RV setup, or maintaining an energy storage cabinet, this compact, easy-to-install unit delivers professional-grade performance without the premium price tag — don't let cell imbalances shorten your battery life, invest in stability and efficiency now.

Feature

• Stable Operation: Whether the battery is in charging, discharging, or dormant state, it will automatically perform intelligent balancing.
• Energy Transfer Balancing: Low energy consumption, low heat generation, can be connected to the battery pack for a long time.
• High-end Core Components: High-quality capacitors + insulated base, ensuring safe and efficient operation.

Details

1. Pre-designed Screw Holes: Enables quick, secure installation for faster assembly.
2. Anti-reverse Buckle Harness: Prevents misconnection faults and ensures a tight, stable fit.

4S 5A Battery Balancer Dimension

4S 5A Battery Balancer Structure

4S 5A Battery Balancer Wiring Diagram

Notes: Please solder and inspect the cable harness independently first. Only after confirming there are no errors should you plug in the balancing module.

1. Solder the Cable Harness: Start connecting the cable harness from the main negative terminal B-. Then, connect the second black wire (first red wire) to the positive terminal of the first battery string, and continue connecting to the positive terminals of each subsequent battery string in sequence, until the last red wire is connected to the main positive terminal B+.
2. Measure the Voltage: After connecting the entire cable harness, use a multimeter to check that the voltage of each string and the total voltage are within the normal range (3.0~4.15V for ternary lithium batteries, 2.5~3.6V for LiFePO4 batteries). If the voltage is abnormal, check for soldering issues such as cold solder joints, false soldering, or uneven solder points. Only after confirming the voltage is normal can you plug in the active balancing module.
3. Start Using: Active balancing module will activate automatically when powered on. If the cable harness becomes disconnected, you will need to power it off and on again to reactivate. The module will automatically start balancing when the voltage of any battery string is ≥3.1+0.1V and stop when it drops to ≤3.0+0.1V. The green indicator light will be on when balancing is active and off when it is inactive.