---
product_id: 495078241
title: "100A 4S 3.7V Lithium Battery Protection Board 14.8V 16.8V with Balance Over-Current Over-Charge Over-Discharge Short-Circuit Protection BMS Protection PCB Board(4S 3.7V 100A)"
brand: "knacro"
price: "KD 6.67"
currency: KWD
in_stock: true
reviews_count: 1
category: "Knacro"
url: https://www.desertcart.com.kw/products/495078241-100a-4s-3-7v-lithium-battery-protection-board-14-8v
store_origin: KW
region: Kuwait
---

# 100A max continuous discharge 4S 14.8V Li-ion battery support Multi-layer protection system 100A 4S 3.7V Lithium Battery Protection Board 14.8V 16.8V with Balance Over-Current Over-Charge Over-Discharge Short-Circuit Protection BMS Protection PCB Board(4S 3.7V 100A)

**Brand:** knacro
**Price:** KD 6.67
**Availability:** ✅ In Stock

## Summary

> 🛡️ Keep your battery pack safe, balanced, and powering your day without compromise!

## Quick Answers

- **What is this?** 100A 4S 3.7V Lithium Battery Protection Board 14.8V 16.8V with Balance Over-Current Over-Charge Over-Discharge Short-Circuit Protection BMS Protection PCB Board(4S 3.7V 100A) by knacro
- **How much does it cost?** KD 6.67 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/495078241-100a-4s-3-7v-lithium-battery-protection-board-14-8v)

## Best For

- knacro enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Robust PCB design with ultra-low self-consumption and wide temperature tolerance
- • **Plug & Play Simplicity:** Includes 5P-250mm wires and intuitive wiring for hassle-free installation
- • **Precision Voltage Balance:** Equilibrium function ensures each cell stays perfectly balanced for longevity
- • **Comprehensive Safety Suite:** Protects against overcharge, over-discharge, over-current & short circuits
- • **Powerhouse Current Handling:** Handles up to 100A continuous discharge for demanding setups

## Overview

This 4S 3.7V 100A Lithium Battery Protection Board is engineered to safeguard your 14.8V lithium battery packs with advanced multi-protection features including overcharge, over-discharge, over-current, and short-circuit prevention. Its cell balancing function extends battery life, while a robust 100A continuous discharge rating supports high-demand applications. Designed for easy integration with included wiring, it ensures reliable, long-lasting performance in professional and industrial environments.

## Description

- Protection circuit board is the heart of battery pack, must to have to avoid battery pack from explosion, fire and damage - It will protect battery pack from overcharging, over-discharging over-current and short circuit - With equilibrium function to keep each cell in balance and good service life - Used for 4 series 12V Lithium batteries, comes with 5P-250mm wires - Choosing the correct protection board and applying it appropriately is vital to the longevity your batteries Specification: - Discharge - Continuous Discharging Current: 100(MAX) A - Instantaneous Discharge Current: 120 A - Charge - Charging Voltage: 16.8 V - Charging Current: 10(MAX) A - Overcharge Protect - Over-charge Detect: 4.28±0.05 V - Protect Delay: 0.5S - Over-charge release: 4.08 ±0.05 V - Balance - Detect Voltage: 4.2±0.05 V - Release Voltage: 4.2±0.05 V - Balance Current:58 - Over-discharge Protect: - Over-discharge Detec t: 2.5±0.08 V - Over-discharge Detect delay: 0.1S - Release Voltage: 2.9±0.1 V - Over-current Protect: - Detect Voltage 150 mV - Detect Delay: 40 mS - Current Detect: 120±10 A - Release Condition: Cut Load - Short-circuit Protect - Protect Condition: Load Short Circuit - Detect Delay: 250 uS - Release Condition: Cut Load - Temperature Protect : / / ℃ - Resistance - Inner: ≤20 mΩ - Self-Consumption - Working Current: ≤ 30 uA - Sleep Current (when Over-discharge): ≤20 uA - Working Temperature - Range: -20/+80 ℃ - Size: 70*60*8.5mm Package Includes: 1 Piece Battery Protection Board

Review: Accurate BMS w/ Charge & Discharge cutoffs. - Overall, no complaints or dislikes with the chip. This BMS board works well unlike others which had cut off parameters outside of acceptable limits. I charged a 4s5p pack at 8A CC to 16V, then dropped amps down to 4A CC for final charge out. charger was around 4A CC / 17.6V VC when BMS kicked out. Pack tests at 16.67V. Im confident if i dropped charge current down to 1A that the pack would test out to the 16.8 to 16.9V per manufacturer cutout (noted as per series in the specs) The instructions are simple. I like the 5x pigtails for BMS, then the 3 bank B-, P-, & C- for the functional end of the board. It simplifies the wiring process. Again, this is far more robust than the other chips i have tried. this will be the implemented chip in the finished products if the discharge cutoff functions per spec which I'm confident it will. I won't use this pack for high discharge currents so no opinion on the 100A draw rating it notes. Seeing how the management side uses the negative terminals to work and the build quality, I can see the 100A draw being accurate. I am using it to power surveying equipment which is relatively lower draw but will prevent battery swaps for whole day setups. The 10A charge restriction makes sense as the charging side of batteries tends to be the wear down cycle. a slower charge will provide better cell conditioning. I'd check with the cell manufacturer charge current per cell and review that with how many cells your config runs in parallel. The length and width dimensions are correct. I would use 9mm for the thickness as that's what I get from the screw heads.

## Features

- Protection circuit board is the heart of battery pack, must to have to avoid battery pack from explosion, fire and damage
- It will protect battery pack from overcharging, over-discharging over-current and short circuit.
- With equilibrium function to keep each cell in balance and good service life
- Used for 4 series 12V LiFePO4 batteries, comes with 5P-250mm wires
- Choosing the correct protection board and applying it appropriately is vital to the longevity your batteries

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09QZDZDMG |
| Best Sellers Rank | #511,547 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,261 in Power Converters |
| Customer Reviews | 4.6 4.6 out of 5 stars (14) |
| Date First Available | January 16, 2018 |
| Item Weight | 2.11 ounces |
| Item model number | 4S-3.7V-100A |
| Manufacturer | KNACRO |
| Product Dimensions | 2.76 x 2.36 x 0.33 inches |

## Product Details

- **Brand:** KNACRO
- **Input Voltage:** 12 Volts
- **Item Weight:** 0.06 Kilograms
- **Item dimensions L x W x H:** 2.76 x 2.36 x 0.33 inches
- **Output Voltage:** 12 Volts

## Images

![100A 4S 3.7V Lithium Battery Protection Board 14.8V 16.8V with Balance Over-Current Over-Charge Over-Discharge Short-Circuit Protection BMS Protection PCB Board(4S 3.7V 100A) - Image 1](https://m.media-amazon.com/images/I/714Fmr9w04L.jpg)
![100A 4S 3.7V Lithium Battery Protection Board 14.8V 16.8V with Balance Over-Current Over-Charge Over-Discharge Short-Circuit Protection BMS Protection PCB Board(4S 3.7V 100A) - Image 2](https://m.media-amazon.com/images/I/71qDDHoWUSL.jpg)
![100A 4S 3.7V Lithium Battery Protection Board 14.8V 16.8V with Balance Over-Current Over-Charge Over-Discharge Short-Circuit Protection BMS Protection PCB Board(4S 3.7V 100A) - Image 3](https://m.media-amazon.com/images/I/71Y9Lb28gGL.jpg)
![100A 4S 3.7V Lithium Battery Protection Board 14.8V 16.8V with Balance Over-Current Over-Charge Over-Discharge Short-Circuit Protection BMS Protection PCB Board(4S 3.7V 100A) - Image 4](https://m.media-amazon.com/images/I/61hIkMS+xsL.jpg)
![100A 4S 3.7V Lithium Battery Protection Board 14.8V 16.8V with Balance Over-Current Over-Charge Over-Discharge Short-Circuit Protection BMS Protection PCB Board(4S 3.7V 100A) - Image 5](https://m.media-amazon.com/images/I/71FLORsFNUL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Accurate BMS w/ Charge & Discharge cutoffs.
*by A***R on July 21, 2023*

Overall, no complaints or dislikes with the chip. This BMS board works well unlike others which had cut off parameters outside of acceptable limits. I charged a 4s5p pack at 8A CC to 16V, then dropped amps down to 4A CC for final charge out. charger was around 4A CC / 17.6V VC when BMS kicked out. Pack tests at 16.67V. Im confident if i dropped charge current down to 1A that the pack would test out to the 16.8 to 16.9V per manufacturer cutout (noted as per series in the specs) The instructions are simple. I like the 5x pigtails for BMS, then the 3 bank B-, P-, & C- for the functional end of the board. It simplifies the wiring process. Again, this is far more robust than the other chips i have tried. this will be the implemented chip in the finished products if the discharge cutoff functions per spec which I'm confident it will. I won't use this pack for high discharge currents so no opinion on the 100A draw rating it notes. Seeing how the management side uses the negative terminals to work and the build quality, I can see the 100A draw being accurate. I am using it to power surveying equipment which is relatively lower draw but will prevent battery swaps for whole day setups. The 10A charge restriction makes sense as the charging side of batteries tends to be the wear down cycle. a slower charge will provide better cell conditioning. I'd check with the cell manufacturer charge current per cell and review that with how many cells your config runs in parallel. The length and width dimensions are correct. I would use 9mm for the thickness as that's what I get from the screw heads.

## Frequently Bought Together

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-05-18*