---
product_id: 257656207
title: "2Pack Enhanced 4S 40A 16.8V Li-ion Lithium Battery Protection Board PCB BMS Charger Protection Circuit Balance Charging Module for Drill Motor Motorcycle Battery (4S 40A)"
brand: "atnsinc"
price: "€ 20.11"
currency: EUR
in_stock: true
url: https://www.desertcart.com.cy/products/257656207-2pack-enhanced-4s-40a-16-8v-li-ion-lithium-battery
store_origin: CY
region: Cyprus
---

# 40A Current Rating Compact & Lightweight 16.8V Output Voltage 2Pack Enhanced 4S 40A 16.8V Li-ion Lithium Battery Protection Board PCB BMS Charger Protection Circuit Balance Charging Module for Drill Motor Motorcycle Battery (4S 40A)

**Brand:** atnsinc
**Price:** € 20.11
**Availability:** ✅ In Stock

## Summary

> 🔋 Power Up Your Projects with Confidence!

## Quick Answers

- **What is this?** 2Pack Enhanced 4S 40A 16.8V Li-ion Lithium Battery Protection Board PCB BMS Charger Protection Circuit Balance Charging Module for Drill Motor Motorcycle Battery (4S 40A) by atnsinc
- **How much does it cost?** € 20.11 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/257656207-2pack-enhanced-4s-40a-16-8v-li-ion-lithium-battery)

## Best For

- atnsinc enthusiasts

## Why This Product

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

## Key Features

- • **📦 Durable Design:** Crafted with fine workmanship for long-lasting stability and reliability.
- • **🌱 Low Standby Current:** Save energy with a MOS transistor that minimizes standby current consumption.
- • **🔒 Multiple Protections:** Experience peace of mind with over-discharge, overcurrent, and overcharge safeguards.
- • **🔧 Versatile Applications:** Perfect for various lithium batteries and electric drills with specific power requirements.
- • **⚙️ High-Accuracy Circuit:** Enjoy precision with a high-accuracy voltage detection circuit for optimal performance.

## Overview

The 2Pack Enhanced 4S 40A Li-ion Battery Protection Board is a high-quality, compact charging module designed for lithium batteries. It features multiple safety protections, a high-accuracy voltage detection circuit, and is suitable for various applications, including electric drills. With a low standby current and durable design, this PCB BMS Charger ensures stable performance for all your power needs.

## Description

2Pack Enhanced 4S 40A 16.8V Li-ion Lithium Battery Protection Board PCB BMS Charger Protection Circuit Balance Charging Module for Drill Motor Motorcycle Battery (4S 40A)

## Features

- High Quality; Compact size and lightweight;High-accuracy voltage detection circuit; fine workmanship and durable; stable performance.
- Multiple Protections: Over-discharge protection, overcurrent protection, overcharge protection; High charge and discharge current
- LOW STANDBY CURRENT: MOS transistor can control the battery charge and discharge, low standby current consumption.
- Applications:It is suitable for lithium batteries with nominal voltage of 3.7V and full voltage of 4.2V (including 18650, 26650, polymer lithium batteries, no size limit).Besides, it can use for electric drill with starting current below 80A and power below 135W .
- If you want to start the drill successfully, it requires 3pcs15C-20C power batteries, or 6pcs10C-15C power batteries (Note: ordinary 18650 battery can not start the drill!! Recommended power battery models: VTC4, VTC4A, VTC5A, VTC6). About connecting cables, we suggest using more than 3 square millimeters copper wire.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Current Rating | 40 Amps |
| Input Voltage | 240 Volts |
| Output Voltage | 16.8 Volts (DC) |
| Item Weight | 0.02 Kilograms |
| Color | 4S 40A |

## Product Details

- **Brand:** ATNSINC
- **Color:** 4S 40A
- **Item Weight:** 0.02 Kilograms
- **Output Voltage:** 16.8 Volts (DC)
- **Input Voltage:** 240 Volts

## Images

![2Pack Enhanced 4S 40A 16.8V Li-ion Lithium Battery Protection Board PCB BMS Charger Protection Circuit Balance Charging Module for Drill Motor Motorcycle Battery (4S 40A) - Image 1](https://m.media-amazon.com/images/I/81dmucJUzdL.jpg)

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.com.cy/products/257656207-2pack-enhanced-4s-40a-16-8v-li-ion-lithium-battery](https://www.desertcart.com.cy/products/257656207-2pack-enhanced-4s-40a-16-8v-li-ion-lithium-battery)

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-15*