---
product_id: 166027929
title: "KOOBOOK 10pcs 3A BMS Protection Board for 1S 3.7V 18650 Li-ion Battery"
brand: "koobook"
price: "€ 15.07"
currency: EUR
in_stock: true
reviews_count: 11
category: "Koobook"
url: https://www.desertcart.com.cy/products/166027929-koobook-10pcs-3a-bms-protection-board-for-1s-3-7v
store_origin: CY
region: Cyprus
---

# 3A max current 1S 3.7V Li-ion support Multi-layer battery protection KOOBOOK 10pcs 3A BMS Protection Board for 1S 3.7V 18650 Li-ion Battery

**Brand:** koobook
**Price:** € 15.07
**Availability:** ✅ In Stock

## Summary

> 🛡️ Power up safely, stay ahead effortlessly!

## Quick Answers

- **What is this?** KOOBOOK 10pcs 3A BMS Protection Board for 1S 3.7V 18650 Li-ion Battery by koobook
- **How much does it cost?** € 15.07 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/166027929-koobook-10pcs-3a-bms-protection-board-for-1s-3-7v)

## Best For

- koobook enthusiasts

## Why This Product

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

## Key Features

- • **Low Power Consumption:** Optimized for minimal current draw, extending battery life and efficiency.
- • **Bulk Pack for Projects:** Includes 10 protection boards—perfect for prototyping or scaling your battery packs.
- • **Compact & Versatile Design:** Slim 30x3.7x2.2mm board fits various 18650 battery shapes with easy wiring.
- • **Comprehensive Battery Safety:** Built-in overcharge, over-discharge, short circuit, and overcurrent protection ensures absolute battery safety.
- • **Reliable 3A Current Handling:** Supports continuous current up to 3A for stable power delivery.

## Overview

The KOOBOOK 10pcs 3A BMS Protection Board is a compact, high-performance battery management system designed for single-cell 3.7V 18650 Li-ion batteries. It delivers reliable 3A continuous current with advanced protections against overcharge, over-discharge, short circuit, and overcurrent, ensuring maximum safety and longevity for your battery packs. Ideal for DIY electronics, power banks, and professional projects, this pack of 10 boards offers excellent value and peace of mind for millennial managers who demand both efficiency and safety.

## Description

Specifications: Over charge release voltage: 4.23±0.05V Over charging voltage range: 4.25±0.05V Over discharge voltage range: 2.45±0.1V Upper limit continuous current: 2A Overcurrent detection current: 2.5A Charging voltage: 4.2V IC component: DW01+8205A Size: approx.30*3.7*2.2mm Connection description: B+ connect to battery+ B- connect to battery- P+ for battery output input+ P- for battery output input- Note: Manual measurement, with small error. Please check size in detail before purchase. Real colors may slightly differ from the pictures, as it depends on specific monitor settings and light brightness. We highly appreciate all customers opinions to improve the selling, also if anything you unsatisfied, please contact us for probable best solution. Package Includes: 10Pcs

Review: Did not burn down my house... yet - Used these to make a small battery pack for an electronics project, and so far it has not burned down my house. It does work - both charging and discharging. I have not tested it a ton, but good experience so far. I guess don't be worried that the charge / discharge specs are via an image that uses comic sans. But maybe still do? If your house burns down I am not liable. Your experience may vary. But yeah I like it so far.
Review: Input - Yes, Output - YES! - Great Job. I don't understand people saying that there is no "output" and they have to use the battery tabs. That's incorrect. The P+ and P- are the outputs -- solder your wires to those and you are BMS 'protected'. Lay down a couple of layers of kapton on the battery, a strip of G10 would be a nice addition, and weld the strips to the battery (component side down).

## Features

- With over charge, over discharge, short circuit, over current protection function, for a variety of different shapes of 3.N capacity lithium batteries.
- Suitable for many requirements of high integration, low cost occasions.
- Can meet the performance requirements of many aspects, to ensure, the absolute safety of the battery group.
- Low current consumption,stable performance.
- Strictly follow the diagram wiring, do not intentionally short-circuit! After the line is connected, you need to charge first, then there will be output.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07W75BQWW |
| Best Sellers Rank | #84,506 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #68 in Lab Power Supplies #131 in Life Science Supplies |
| Brand | KOOBOOK |
| Color | Green |
| Customer Reviews | 4.4 out of 5 stars 151 Reviews |
| Input Voltage | 3.7 volts |
| Item Weight | 0.01 kg |
| Manufacturer | KOOBOOK |
| Mfr Part Number | KB457 |
| Model Number | KB457 |
| Number of Items | 10 |
| Number of Outlets | 10 |
| Output Voltage | 3.7 volts |
| Plug Format | Type A |
| Plug Type | Type A |
| Power Source | rechargeable battery |
| UPC | 797805999058 |
| Unit Count | 10 Count |

## Product Details

- **Brand:** KOOBOOK
- **Color:** Green
- **Input Voltage:** 3.7 volts
- **Item Weight:** 0.01 kg
- **Output Voltage:** 3.7 volts

## Images

![KOOBOOK 10pcs 3A BMS Protection Board for 1S 3.7V 18650 Li-ion Battery - Image 1](https://m.media-amazon.com/images/I/61qawjMYboL.jpg)
![KOOBOOK 10pcs 3A BMS Protection Board for 1S 3.7V 18650 Li-ion Battery - Image 2](https://m.media-amazon.com/images/I/61HPF6MwjxL.jpg)
![KOOBOOK 10pcs 3A BMS Protection Board for 1S 3.7V 18650 Li-ion Battery - Image 3](https://m.media-amazon.com/images/I/51MPngvNyWL.jpg)
![KOOBOOK 10pcs 3A BMS Protection Board for 1S 3.7V 18650 Li-ion Battery - Image 4](https://m.media-amazon.com/images/I/61tQui8C-XL.jpg)
![KOOBOOK 10pcs 3A BMS Protection Board for 1S 3.7V 18650 Li-ion Battery - Image 5](https://m.media-amazon.com/images/I/61qfn2veOaL.jpg)

## Questions & Answers

**Q: How do I connect these for 24 volts using 14 18650 batteries? 7 in series, 2 groups in parallel.**
A: I recommend to use 3S 11.1V 12.6V 25A W/Balance 18650 Li ion Lithium Battery PCB Protection Board
Know as a BMS. search for DIY 18650 battery pack

**Q: What is the max input voltage? Would 5v be ok**
A: 5v input should be fine. The battery will be allowed to charge till a battery measure of 4.25 is reached, then the circuit will disconnect your 5v input from the battery.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Did not burn down my house... yet
*by M***N on July 30, 2024*

Used these to make a small battery pack for an electronics project, and so far it has not burned down my house. It does work - both charging and discharging. I have not tested it a ton, but good experience so far. I guess don't be worried that the charge / discharge specs are via an image that uses comic sans. But maybe still do? If your house burns down I am not liable. Your experience may vary. But yeah I like it so far.

### ⭐⭐⭐⭐⭐ Input - Yes, Output - YES!
*by J***I on February 9, 2025*

Great Job. I don't understand people saying that there is no "output" and they have to use the battery tabs. That's incorrect. The P+ and P- are the outputs -- solder your wires to those and you are BMS 'protected'. Lay down a couple of layers of kapton on the battery, a strip of G10 would be a nice addition, and weld the strips to the battery (component side down).

### ⭐⭐⭐⭐⭐ Did its job and I would recommend it
*by J***1 on March 30, 2025*

Listed exactly what I wanted it to do and would recommend to anybody. I was using it to build my own battery pack for items while on the go and it worked perfectly so that there was no overcharging happening on the 18650 batteries.

## Frequently Bought Together

- KOOBOOK 10pcs 3A BMS Protection Board with Solder Belt for 1S 3.7V 18650 Li-ion Lithium Battery Cell Kit
- RAKwireless WisBlock Meshtastic Starter Kit US915 Base RAK19007 + Core RAK4631
- 18650 Battery Case Holder, 4 Pcs 2 Slots x 3.7V DIY Battery Storage Box, in Parallel Black Plastic Batteries Case for 2 x 18650 Ltvystore

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-09-12*