Charger 1 cell 3.7 V Lithium Battery
🔋 3.7V Lithium Battery Charger Module – TP4056 Based, 1 Cell (1S)
This compact Lithium Battery Charger Module is designed to safely charge a single 3.7V Li-ion or Li-Po cell using a micro-USB or Type-C input. Based on the TP4056 charging IC, it ensures precise control of charging voltage and current, with built-in protection circuitry to keep your battery safe.
⚙️ Technical Specifications
| Parameter | Specification |
|---|---|
| Input Voltage | 4.5V – 5.5V DC (via USB or IN+ / IN−) |
| Battery Type | 1S Lithium-Ion / Lithium-Polymer (3.7V) |
| Output Voltage | 4.2V (fully charged battery) |
| Charging Current | Up to 1A (adjustable via onboard resistor) |
| Input Interface | Micro USB or USB-C (depends on version) |
| Protection IC | DW01A + FS8205A Dual MOSFET (if included) |
| Status LEDs | Red = Charging, Blue = Fully Charged |
| Dimensions | ~26mm x 17mm |
✅ Key Features
⚡ Safe & Smart Charging for 1-cell 3.7V batteries
🔌 Accepts input from USB ports, power adapters, or solar panels
🔋 Built-in overcharge, over-discharge, and short-circuit protection (on protected versions)
🧪 Dual LED indicators for charge monitoring
🧰 Easy integration into DIY power banks, Arduino and IoT projects
🛠️ Typical Wiring Guide
| Pin | Connect To |
|---|---|
| B+ / B- | Battery terminals (positive / negative) |
| OUT+ / OUT- | Load or boost converter |
| IN+ / IN- | Optional DC input (if not using USB) |
🧪 Compatible Batteries
18650 Li-ion cells
Flat Li-Po 3.7V batteries
Rechargeable coin or pouch cells (3.7V nominal)