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In stock fast shipping lighted 3A balance current QNBBM active balancer for RV and Solar system battery

- 2022-12-16 -

Product Description

Two main methods for battery cell charge balancing: passive and active balancing.

The natural method of passive balancing a string of cells in series can be used only for lead-acid and nickel-based batteries.

Active balancing method can be used for all types of batteries, but is effective for a small number of cells in series. The active balancing method is based on the active transport of the energy among the cells. This balancing method does not depend on the chemical characteristics of the cells, and can be used for most types of modern batteries.

This voltage balancer does not waste energy in resistors; it transfers the coulombs from a strong cell to a weak cell.


This is ideal for electric vehicles to prolong its battery cycle life by preventing cell over/under charging; promoting cost-effective sustainable transportation.

Batteries are expensive, this project will help any diy electric vehicle battery to last longer.

In stock fast shipping lighted 3A balance current QNBBM active balancer for RV and Solar system battery

Battery capacity limited
Battery count limited


At least balance 2 cells
Working voltage

1.8V~5V  (2V lead acid battery and lithium battery)

4V~9V  (6V lead acid battery)
9V~15V  (12V lead acid battery and lithium battery)

Battery type limited

LiFePo4, LiMnO4 etc
AGM, Gel, Flooded battery and so on.
Power consumption
<50mW per 1s
Balance method
Energy transfer/ Dynamic
Voltage difference VS Balance current

300mV — 1A

1V — 3A
Voltage difference after using

< 10mV

< 30mV(12V lead acid)
Working efficiency
> 94%
Working temperature
-40℃ ~ +80℃
BMS limited
Can work with BMS or Wordking independently
Storage temperature
-40℃ ~ +100℃


1. Keep the voltage difference of each cell within 10mv.


2. Extend the battery span life 2-3times. Without capacity & voltage & battery type limitation .


3. Your best battery pack protector. Perfect combination with BMS Let’s Save cost from now.

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