---
product_id: 165061635
title: "5pcs 2S 20A 7.4V 8.4V Battery Protection Board BMS Balance Version"
brand: "tecnoiot"
price: "C$4025"
currency: NIO
in_stock: true
url: https://www.desertcart.ni/products/165061635-5pcs-2s-20a-7-4v-8-4v-battery-protection-board
store_origin: NI
region: Nicaragua
---

# 8.4V charging Compact design 2S 20A 5pcs 2S 20A 7.4V 8.4V Battery Protection Board BMS Balance Version

**Brand:** tecnoiot
**Price:** C$4025
**Availability:** ✅ In Stock

## Summary

> 🔧 Power Up Your Projects with Precision!

## Quick Answers

- **What is this?** 5pcs 2S 20A 7.4V 8.4V Battery Protection Board BMS Balance Version by tecnoiot
- **How much does it cost?** C$4025 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/165061635-5pcs-2s-20a-7-4v-8-4v-battery-protection-board)

## Best For

- tecnoiot enthusiasts

## Why This Product

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

## Key Features

- • **Smart Balancing:** Equipped with a balanced charging function for optimal battery health and longevity.
- • **Compact & Efficient:** Measuring just 45*15*3.4mm, it fits seamlessly into your projects without bulk.
- • **User-Friendly Setup:** Designed with clear connection guidelines to simplify installation for all skill levels.
- • **Powerful Performance:** Delivers a continuous discharge current of 20A, perfect for high-demand applications.
- • **Versatile Compatibility:** Supports various lithium battery types, including 18650 and 26650, ensuring flexibility.

## Overview

The TECNOIOT 5pcs 2S 20A Battery Protection Board is a high-performance BMS designed for 7.4V and 8.4V lithium batteries. It features a compact design, supports a continuous discharge current of 20A, and includes a balanced charging function, making it ideal for powering demanding tools and applications.

## Description

5pcs 2S 20A 7.4V 8.4V Battery Protection Board BMS Balance Version

## Features

- 【2S20A】2S 20A 7.4V 8.4V 18650 Lithium Battery Protection Board BMS Balance Version 【Note】The successful start of power drill requires two 10C-20C power batteries, or four 5C-10C power batteries (ordinary 18650 can not start drill! ! !); 0V and 8.4V cable, use 2 square mm Above copper wire (cannot use nickel plate!!!);
- 【Design compact】Applicable scope: Suitable for lithium batteries with nominal voltage of 3.7V and full voltage of 4.2V (including 18650, 26650, polymer lithium batteries, without limitation on the dimensions).Product Size: 45*15*3.4mm (Standard), 48*20*3.4mm (Balancing).Charging voltage: 8.4V - 9.0V.
- 【Descripcion】Continuous discharge current (upper limit): 20A (If the cooling environment is not good, reduce the load current use);Continuous charge current (upper limit): 10A;Balanced version: Suitable for starting currents below 25A and below 50W power drills, or resistive loads below 168W, with balanced charging function.
- 【Note】: Connect 0V, 4.2V, 8.4V according to the diagram strictly. When connecting the battery for the first time, it needs to be charged before output. When the battery is charged, "430" resistance heating is a normal phenomenon, indicating that the equalizing circuit is working; if the "430" resistance is also heating in the state of not charging, please check whether the wrong line is connected.
- 【Note】For some customers with poor electronic foundation, please explain: Do not mix good batteries and bad batteries together! The capacity/internal resistance of 2 batteries should be as close as possible! (1 good battery + 1 bad battery = 2 battery use effect).

## Images

![5pcs 2S 20A 7.4V 8.4V Battery Protection Board BMS Balance Version - Image 1](https://m.media-amazon.com/images/I/71IPfXQY2bL.jpg)
![5pcs 2S 20A 7.4V 8.4V Battery Protection Board BMS Balance Version - Image 2](https://m.media-amazon.com/images/I/41JD23crDSL.jpg)
![5pcs 2S 20A 7.4V 8.4V Battery Protection Board BMS Balance Version - Image 3](https://m.media-amazon.com/images/I/51DLCvH2o4L.jpg)
![5pcs 2S 20A 7.4V 8.4V Battery Protection Board BMS Balance Version - Image 4](https://m.media-amazon.com/images/I/41+RYhgJJfL.jpg)
![5pcs 2S 20A 7.4V 8.4V Battery Protection Board BMS Balance Version - Image 5](https://m.media-amazon.com/images/I/41HictpjCcL.jpg)

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**Shop now:** [https://www.desertcart.ni/products/165061635-5pcs-2s-20a-7-4v-8-4v-battery-protection-board](https://www.desertcart.ni/products/165061635-5pcs-2s-20a-7-4v-8-4v-battery-protection-board)

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-02-07*