4S 5A Active Battery Balancer

5 out of 5 based on 1 reviews | Write a review

$61.99

Purchase 4s 5A active battery balancer online. This low cost battery equalizer is a BMS that connect batteries in series for balancing voltage in 0~5A working current. This active battery equalizer plays a crucial role in optimizing the performance and lifespan of lithium-polymer (LiPo) batteries.

SKU: ATO-ABB-4S5A

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Delivery date: 6-12 days

Overview

The battery balancer actively redistributes energy among cells during charging or discharging processes, promoting uniform voltage levels. This technology is particularly important in LiPo batteries, where cell balance is critical for safety and efficiency. Integrated with a charger, the active balancer enhances the charging process by preventing overvoltage issues.

Specification

Model: ATO-J04-5A
Battery Pack Type: Ternary, Iron Lithium
Number of Battery Pack Strings: 4S (4 Batteries Connected in Series)
Balance Current: ≤5A
Balance Mode: Active Equilibrium
Balance On Condition: First Single String Voltage: ≥3.1±0.1V
Balance Off Condition: Flat First Single String Voltage: ≤3.0±0.1V
Working Power Consumption: ＜1mA
Sleep Current: ＜100uA
Working Power Consumption: <1mA
Balance Accuracy: ±mV
Working Temperature: -20℃~60℃
Harness: Compatible with BMS
Balance Indication Light: Bright: Balance On, OFF: Balance Not On or Fault
Dimension: 97*65*21mm

Dimension (Unit: mm)

4s 8s active battery balencer dimension

Detail

Active battery balencer detail

Application

Active battery balencer application

Tips: Can active battery balancers be used in DIY battery projects?

Yes, active battery balancers can be effectively used in DIY battery projects. These balancers help maintain the voltage balance among individual cells within a battery pack, ensuring optimal performance and longevity. DIY projects often involve assembling batteries from individual cells, and imbalances can lead to reduced overall capacity and lifespan. Active balancers actively redistribute energy between cells, preventing overcharging or discharging of specific cells.

Incorporating active balancers enhances the safety and efficiency of DIY battery systems, particularly in applications like electric vehicles, solar power storage, or portable electronics. These devices continuously monitor and adjust individual cell voltages, mitigating the risk of cell damage and improving the overall reliability of the battery pack. DIY enthusiasts should consider the compatibility of active balancers with their specific battery chemistry and voltage requirements for a successful integration into their projects.

Existing reviews of 4S 5A Active Battery Balancer

Effective and reliable balancer

I’ve been using this 4S 5A active battery balancer in my LiPo setup, and it has made a clear improvement in how evenly my cells perform. Before installing it, I often had one or two cells drifting out of balance after longer cycles, but now the voltage stays much more consistent across all four cells. The 0–5A balancing current is strong enough to correct imbalances quickly without heating up, and installation was straightforward since it connects directly across the series pack. After several charge–discharge cycles, my battery pack runs more efficiently and holds capacity more evenly, which gives me more confidence in both performance and long-term lifespan. For the price, it’s a very effective and reliable balancer.

From: Eleanor | Date: 25/11/2025

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