---
product_id: 543922835
title: "JacobsParts Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack)"
brand: "jacobsparts"
price: "€ 11.80"
currency: EUR
in_stock: true
reviews_count: 8
category: "Jacobs Parts"
url: https://www.desertcart.es/products/543922835-jacobsparts-smallest-usb-type-c-3-7v-lithium-battery-charger
store_origin: ES
region: Spain
---

# 4.2V stable output voltage 1A fast charge current Integrated multi-layer protection JacobsParts Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack)

**Brand:** jacobsparts
**Price:** € 11.80
**Availability:** ✅ In Stock

## Summary

> 🔌 Tiny charger, mighty power – never let your battery run dry!

## Quick Answers

- **What is this?** JacobsParts Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack) by jacobsparts
- **How much does it cost?** € 11.80 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/543922835-jacobsparts-smallest-usb-type-c-3-7v-lithium-battery-charger)

## Best For

- jacobsparts enthusiasts

## Why This Product

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

## Key Features

- • **Smart Charge Cycle:** Automatically stops and resumes charging to maximize battery lifespan and efficiency.
- • **Safety-First Design:** Built-in over-current, over-voltage, and under-voltage protection ensures worry-free charging.
- • **LED Charge Indicators:** Clear, bright LEDs keep you informed of charging status at a glance.
- • **Ultra-Compact Powerhouse:** At just 14×18×5mm, fits seamlessly into tight, precision-driven projects.
- • **Type-C Universal Compatibility:** Works effortlessly with modern USB-C PD chargers for broad device support.

## Overview

The JacobsParts Smallest USB Type C Lithium Battery Charger Board is a compact, high-efficiency 1A charging module designed for 3.7V lithium batteries. Featuring USB-C input, automatic charge cycle management, and robust safety protections, it delivers reliable 4.2V charging in a sleek 14×18×5mm form factor—perfect for professional-grade, space-conscious electronics projects.

## Description

The JacobsParts Ultra-Small Lithium Battery Charging Board is engineered for efficient charging of 3.7V lithium batteries. Compact and weighing practically nothing, it incorporates a powerful 1A high current linear charging system, delivering fast and reliable charging. This product includes a Type-C interface for the power source, achieving compatibility with most PD chargers and ensuring broad connectivity. This well-designed charging module boasts an operational input voltage range of 5-6V and offers a stable output voltage of 4.2V, providing reliable and steady charging. Its intuitive design assures an automatic termination of the charging cycle when the final float voltage is reached and the charging current decreases to 100mA. The charging cycle automatically resumes when the battery voltage falls below 4.05V, corresponding to 80-90% of the battery capacity, guaranteeing a full battery. When your battery voltage dips lower than 2.9V, this unit initiates a pre-charging process with a 100mA current to safely and steadily rejuvenate your battery. The JacobsParts Charging Board is built with an integrated protection circuit, providing over-discharge protection with a value of 2.4V and over-current protection of 4A, ensuring the safety and longevity of your lithium battery. The board is simple to use, simply connect it to the power supply and it's ready to go. Despite its numerous functionalities, the board is surprisingly compact with dimensions of 14×18×5mm. The Type C port projects approximately 1.5mm, adding hardly any bulk to the unit.

Review: Slight Issue BUT DEFINATELY RECOMMENDED! - Although one of the connectors had a defective problem, it was quickly replaced. When compared with vast majority similar competitive products, this particular unit is vastly superior from my experience. It is smaller and allows for secure precision mounting ... especially in 3d print configuration. It also has components mounted in from edge allowing for gripping of edges or use in really tight configurations. Itd indicator LED is near enough the connector with the brightness enough that no particular considerations are needed. My future design projects WILL include these modules! DEFINATELY RECOMMENDED!
Review: Small and it works! Anyone who is using 18650 batteries should have this! - When you buy these, make sure you understand how this works. It charges batteries but you can't draw power from the USB-C charging port. There are other small charging boards that can do both! Just search here at desertcart.

## Features

- An ultra-small, 1A charging board for 3.7V lithium batteries with USB Type-C power input and LED charge indicators
- Charges to 4.2V, provides 100mA pre-charging for batteries with voltages under 2.9V
- Incorporates automatic charge cycle termination and resumption for efficient charging
- Integrates safety features including over-current, over-voltage, and under-voltage protection for secure charging
- Compact and lightweight design (14×18×5mm), easy to install and use.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CBNQH836 |
| Best Sellers Rank | #368,629 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,627 in Power Converters |
| Customer Reviews | 4.6 4.6 out of 5 stars (47) |
| Date First Available | July 11, 2023 |
| Item Weight | 1 ounces |
| Item model number | CPNT-E-2PK |
| Manufacturer | JacobsParts |
| Product Dimensions | 0.71 x 0.55 x 0.2 inches |

## Product Details

- **Brand:** JacobsParts
- **Color:** Black
- **Item Weight:** 1 Ounces
- **Output Voltage:** 4.2 Volts
- **Product Dimensions:** 0.71"D x 0.55"W x 0.2"H

## Images

![JacobsParts Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack) - Image 1](https://m.media-amazon.com/images/I/712iJtKzNNL.jpg)
![JacobsParts Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack) - Image 2](https://m.media-amazon.com/images/I/71C8OrW2CeL.jpg)
![JacobsParts Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack) - Image 3](https://m.media-amazon.com/images/I/71I0YL8vYAL.jpg)
![JacobsParts Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack) - Image 4](https://m.media-amazon.com/images/I/71XZf5KwitL.jpg)
![JacobsParts Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack) - Image 5](https://m.media-amazon.com/images/I/71vhDJ81YOL.jpg)

## Available Options

This product comes in different **Item Package Quantity** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Slight Issue BUT DEFINATELY RECOMMENDED!
*by J***N on March 4, 2025*

Although one of the connectors had a defective problem, it was quickly replaced. When compared with vast majority similar competitive products, this particular unit is vastly superior from my experience. It is smaller and allows for secure precision mounting ... especially in 3d print configuration. It also has components mounted in from edge allowing for gripping of edges or use in really tight configurations. Itd indicator LED is near enough the connector with the brightness enough that no particular considerations are needed. My future design projects WILL include these modules! DEFINATELY RECOMMENDED!

### ⭐⭐⭐⭐⭐ Small and it works! Anyone who is using 18650 batteries should have this!
*by K***R on May 2, 2024*

When you buy these, make sure you understand how this works. It charges batteries but you can't draw power from the USB-C charging port. There are other small charging boards that can do both! Just search here at Amazon.

### ⭐⭐⭐⭐⭐ Quality Item
*by D***K on March 4, 2024*

This board is working well for me and the size is perfect for my LED flashlight project.

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-02-12*