TP4056 Lithium Battery Charger Module With Protection Dual Functions

🔋 TP4056 Lithium Battery Charger Module

With Protection – Dual Function (Charging + Protection)

🔹 Product Overview

The TP4056 Lithium Battery Charger Module with Protection (Dual Function) is a compact and reliable charging board designed for single-cell 3.7V Li-ion and LiPo batteries.

This module performs two main functions:
1️⃣ Battery Charging
2️⃣ Battery Protection

It ensures safe charging and protects the battery from overcharge, over-discharge, overcurrent, and short circuit — making it ideal for DIY electronics, power banks, and embedded systems.

🔹 Key Features

• ✅ Supports 3.7V single-cell Li-ion / LiPo battery (1S)

• ✅ Charging current up to 1A

• ✅ Built-in overcharge protection

• ✅ Built-in over-discharge protection

• ✅ Overcurrent & short circuit protection

• ✅ Automatic charging cut-off at 4.2V

• ✅ CC/CV charging method

• ✅ LED indicators (Charging / Full)

• ✅ Compact and lightweight PCB

🔹 Technical Specifications

🔹 Pin Description

• IN+ / IN- → 5V Input

• B+ / B- → Battery Connection

• OUT+ / OUT- → Protected Output to Load

🔹 How It Works

🔹 Charging Mode:

• Provides constant current (CC) until battery reaches 4.2V

• Switches to constant voltage (CV)

• Stops charging automatically when full

🔹 Protection Mode:

• Cuts off output if battery voltage drops below ~2.4V

• Stops charging if voltage exceeds 4.2V

• Protects against short circuit

🔹 Applications

• 🔋 DIY Power Banks

• 🤖 Robotics Projects

• 🔦 LED Emergency Lights

• 📱 Portable Gadgets

• 🧪 Arduino & IoT Projects

• 🔌 Rechargeable Battery Packs

🔹 Advantages

✔ Safe & reliable charging
✔ Dual function (Charge + Protect)
✔ Easy to use
✔ Low cost
✔ Small size for compact devices

🔹 Important Notes ⚠

• Use only single 3.7V cell (1S)

• Do NOT use for 2S, 3S, or 4S battery packs

• Input must be stable 5V

• Ensure correct battery polarity

• Do not charge damaged batteries