---
product_id: 395618870
title: "3S 4S 12V 5A Battery Active Equalizer BMS Balancer Lipo Li-ion LFP LiFePO4 Lithium Battery Balance Active Energy Transfer Equalization Module Faster Whole Group Capacitor Balancer PCB"
brand: "qinizx"
price: "€ 45.55"
currency: EUR
in_stock: true
reviews_count: 5
category: "Qinizx"
url: https://www.desertcart.ie/products/395618870-3s-4s-12v-5a-battery-active-equalizer-bms-balancer-lipo
store_origin: IE
region: Ireland
---

# 5.5A max balance current 2.7V-4.2V working voltage range Under-voltage sleep protection 3S 4S 12V 5A Battery Active Equalizer BMS Balancer Lipo Li-ion LFP LiFePO4 Lithium Battery Balance Active Energy Transfer Equalization Module Faster Whole Group Capacitor Balancer PCB

**Brand:** qinizx
**Price:** € 45.55
**Availability:** ✅ In Stock

## Summary

> ⚡ Balance Smarter, Last Longer — The Ultimate Battery Equalizer for Pros

## Quick Answers

- **What is this?** 3S 4S 12V 5A Battery Active Equalizer BMS Balancer Lipo Li-ion LFP LiFePO4 Lithium Battery Balance Active Energy Transfer Equalization Module Faster Whole Group Capacitor Balancer PCB by qinizx
- **How much does it cost?** € 45.55 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/395618870-3s-4s-12v-5a-battery-active-equalizer-bms-balancer-lipo)

## Best For

- qinizx enthusiasts

## Why This Product

- Trusted qinizx brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Continuous Multi-Cell Equalization:** Balances cells across the entire voltage range, not just near full charge—no more weak links.
- • **Dormant Mode with <0.1mA Power Draw:** Smart sleep mode protects your battery without wasting energy when idle.
- • **Precision Balancing at 5mV Accuracy:** Keep your battery pack perfectly synchronized for peak performance and longevity.
- • **Backward Compatible & Easy Installation:** Fits 3S to 4S packs with clear wiring guidance—future-proof your battery management.
- • **Ultra-Low Resistance MOS & 2OZ Copper PCB:** Maximize energy transfer efficiency with premium-grade components.

## Overview

The 3S 4S 12V 5A Battery Active Equalizer is a high-precision capacitor energy transfer balancer designed for Li-ion and LiFePO4 batteries. Featuring ultra-low internal resistance MOSFETs and a thick copper PCB, it delivers up to 5.5A balancing current with 5mV voltage accuracy. Its continuous balancing across the full voltage range, under-voltage sleep protection, and ultra-low standby current (<0.1mA) ensure optimal battery health and efficiency. Compact and backward compatible, it’s ideal for professional-grade battery packs from 30 to 200AH.

## Description

Capacitor energy transfer balance board with Balance cable (upgraded version, 5mv high precision, whole group balance, not adjacent balance) Technical Parameters: Working voltage: 2.7V-4.2V, suitable for NCM Ternary polymer lithium battery (Li-ion), lithium iron phosphate battery (LiFePO4). Working principle: Flycap-capacitor transfer charge transporter, Balancer board is connected to the battery to start the balance work, using the original brand new ultra-low internal resistance MOS, 2OZ copper thickness PCB, balance current 0-5.5A, the more balanced the battery current is Small, reserved for the dormant switch wiring position, the dormant power-off mode working current is less than 0.1mA, and the balance voltage accuracy is within 5mv! The quiescent current is about 9mA, and the battery capacity is recommended to be used between 30-200AH/Per Balancer. With under-voltage sleep protection, only detecting the battery voltage of B1, the equalizer will automatically stop entering the sleep state when the B1 voltage is lower than 2.7V, and the standby power consumption is <0.1mA. Board size: 66x46x16mm/2.6x1.8x0.63inch Balance cable length: 400mm/15.7inch One LED indicator: It will always be on during normal operation, but it will not turn on when there is a problem or malfunction. RUN pad: you can add a switch to control the balancer. Default short connect, let balancer working. if disconnect, it will not working. Tips: This balancer board is backward compatible by default. If it is used for 3S, the last line B4+ is empty. Note: 1. Please start wiring from the total negative pole, followed by B-, B1+, ... B4+.(Test per string battery voltage whether is right before connect to Balancer board). 2. The time required for equalization mainly depends on the battery capacity. Package Includes: 1x 4S Balancer Board 1x 5-Pin Cable

Review: I'm sold. These little guys just work. Latest build is a 4S2P 12v LIFEPO4 and the cells have been as much as .20 out of balance while charging. Within a couple hours they are exactly the same. I've read some horror stories with these and the main thing to.prevent problems is to install these before the battery pack is a mess of mismatched voltages.
Review: Connected this balancer to a 6S2P bank of SCIB 20AH LTO cells and after a few hours it had every cell within 2mv of eachother. Unlike other balancers that only balance when near full charge this balancer continues to operate throughout the voltage range so take that into account when choosing the best balancer for your application.

## Features

- Working Voltage: 2.7V-4.2V, suitable for NCM Ternary polymer lithium battery (Li-ion), lithium iron phosphate battery (LiFePO4). It can Not fit LTO battery. 【NOTE Tips】Well tested by the manufacturer. As long as the wiring is correct, the product guarantees long-lasting and effective performance. Of course, if customers have any questions, they can take the initiative to contact us, we are absolutely capable of providing more professional answers, rather than a direct refund returns.
- Working Principle: Flying capacitor transfer charge transporter, Balancer board is connected to the battery to start the balance work, using the original brand new ultra-low internal resistance MOS, 2OZ copper thickness PCB. Balance current 0-5.5A, the more balanced the battery current is Small, reserved for the dormant switch wiring position, the dormant power-off mode working current is less than 0.1mA, and the balance voltage accuracy is within 5mv!
- The quiescent current is about 9mA, and the battery capacity is recommended to be used between 30-200AH/Per Balancer. High-capacity batteries can be connected in parallel with multiple equalizers.
- With under-voltage sleep protection, only detecting the battery voltage of B1, the equalizer will automatically stop entering the sleep state when the B1 voltage is lower than 2.7V, and the standby power consumption is less than 0.1mA.
- 【NOTE】: Before connect the balance cable to the balance board, be sure to check whether the connections of each section of the battery pack are correct, and do a good job of insulating the bottom of the board and the battery string connection terminals. Otherwise, it will short-circuit and burn the board. Tips: This balancer board is backward compatible by default. eg. If it is used for 3S, the last line B4+ is empty.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B096NLHXPF |
| Best Sellers Rank | #185,706 in Electronics ( See Top 100 in Electronics ) #693 in Household Battery Chargers |
| Item model number | JW-CAP-Balancer-4S |
| Manufacturer | QINIZX |
| Product Dimensions | 6.63 x 4.57 x 1.6 cm; 50 g |

## Product Details

- **Brand:** QINIZX
- **Colour:** Black
- **Input voltage:** 12 Volts
- **Item dimensions L x W x H:** 6.6 x 4.6 x 1.6 centimeters
- **Output voltage:** 12 Volts

## Images

![3S 4S 12V 5A Battery Active Equalizer BMS Balancer Lipo Li-ion LFP LiFePO4 Lithium Battery Balance Active Energy Transfer Equalization Module Faster Whole Group Capacitor Balancer PCB - Image 1](https://m.media-amazon.com/images/I/61Wv0GAAguL.jpg)
![3S 4S 12V 5A Battery Active Equalizer BMS Balancer Lipo Li-ion LFP LiFePO4 Lithium Battery Balance Active Energy Transfer Equalization Module Faster Whole Group Capacitor Balancer PCB - Image 2](https://m.media-amazon.com/images/I/61krFToUXqL.jpg)
![3S 4S 12V 5A Battery Active Equalizer BMS Balancer Lipo Li-ion LFP LiFePO4 Lithium Battery Balance Active Energy Transfer Equalization Module Faster Whole Group Capacitor Balancer PCB - Image 3](https://m.media-amazon.com/images/I/51U8N9wenjL.jpg)
![3S 4S 12V 5A Battery Active Equalizer BMS Balancer Lipo Li-ion LFP LiFePO4 Lithium Battery Balance Active Energy Transfer Equalization Module Faster Whole Group Capacitor Balancer PCB - Image 4](https://m.media-amazon.com/images/I/61eKg-byyqL.jpg)
![3S 4S 12V 5A Battery Active Equalizer BMS Balancer Lipo Li-ion LFP LiFePO4 Lithium Battery Balance Active Energy Transfer Equalization Module Faster Whole Group Capacitor Balancer PCB - Image 5](https://m.media-amazon.com/images/I/61W0nQ6ryfL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by D***S on 4 November 2025*

I'm sold. These little guys just work. Latest build is a 4S2P 12v LIFEPO4 and the cells have been as much as .20 out of balance while charging. Within a couple hours they are exactly the same. I've read some horror stories with these and the main thing to.prevent problems is to install these before the battery pack is a mess of mismatched voltages.

### ⭐⭐⭐⭐⭐ Review
*by J***D on 2 February 2024*

Connected this balancer to a 6S2P bank of SCIB 20AH LTO cells and after a few hours it had every cell within 2mv of eachother. Unlike other balancers that only balance when near full charge this balancer continues to operate throughout the voltage range so take that into account when choosing the best balancer for your application.

### ⭐ Review
*by D***. on 6 September 2023*

Balanced like a champ for 10 minutes after I got it installed on a 16S LiFePO4 pack. Would be a great unit, if it didn't let the smoke out and stop functioning.

## Frequently Bought Together

- 12S-16S 13S 14S 15S 5A Capacitor Active Equalizer Balancer LFP Lifepo4 Lithium Lipo/Titanate LTO Battery Energy Transfer Active Equalization Module Faster Whole Group Balance
- TKDMR 10pcs 1/0 AWG-3/8 Battery Lugs,Heavy Duty Wire Lugs,Ring Terminals,Battery Cable Ends,0 Guage terminals,Battery Terminal Connectors with 10pcs 3:1 Heat Shrink Tubing
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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-14*