Features:
- Single Cell Li-ion Charging: Designed for 3.7V lithium-ion batteries including 18650 cells.
- Integrated Protection Circuit: Provides overcharge, over-discharge, and over-current protection.
- Adjustable Charging Current: Charging current can be configured according to battery capacity requirements.
- Micro USB Input: Convenient charging interface compatible with standard 5V USB power sources.
- LED Charging Indicators: Red LED indicates charging status, green LED indicates fully charged condition.
- Compact Design: Small PCB size suitable for portable and space-limited applications.
- High Charging Accuracy: Provides precise constant-current and constant-voltage charging control.
Principle of Operation:
The TP4056 charger uses a constant-current/constant-voltage (CC/CV) charging method to safely charge a single lithium-ion battery.
- Constant Current Stage: The module charges the battery with a controlled current until the battery voltage reaches approximately 4.2V.
- Constant Voltage Stage: The charger maintains 4.2V while gradually reducing charging current until the battery reaches full capacity.
- Protection Stage: The protection circuit disconnects the battery during abnormal conditions such as overcharge, over-discharge, or excessive current.
| Pin | Description |
|---|---|
| IN+ | 5V positive input |
| IN- | 5V ground input |
| B+ | Positive terminal of lithium battery |
| B- | Negative terminal of lithium battery |
| OUT+ | Protected battery output positive |
| OUT- | Protected battery output negative |
Wiring Example:
| Module | Connection |
|---|---|
| Micro USB / IN+ | 5V USB Power Supply |
| IN- | USB Ground |
| B+ | Battery Positive (+) |
| B- | Battery Negative (-) |
| OUT+ / OUT- | Power output for connected load |
Applications:
- 18650 lithium battery charging systems.
- Portable power supply projects.
- Battery-powered IoT devices.
- Arduino and ESP32 battery applications.
- Wearable electronics.
- DIY power banks.
- Embedded electronics requiring rechargeable batteries.
Specifications:
- Module Type: Lithium-ion Battery Charger with Protection
- Charging IC: TP4056
- Battery Type: Single-cell Li-ion / Li-Po
- Battery Voltage: 3.7V nominal (4.2V full charge)
- Input Voltage: 4.5V – 5.5V DC
- Charging Current: Up to 1A adjustable
- Charge Accuracy: ±1.5%
- Charging Method: CC/CV (Constant Current / Constant Voltage)
- Input Interface: Micro USB
- LED Indicator: Red charging / Green full charge
- Protection: Overcharge, over-discharge, over-current protection
- Dimensions: 25mm × 19mm × 10mm
Important Notes:
- Always verify correct battery polarity before connection.
- This module is designed for one-cell lithium batteries only.
- Charging current should be selected according to battery capacity (typically around 30–40% of battery capacity for safer charging).
- Do not connect batteries with a voltage higher than 4.2 V (full-charge voltage.
Features:
- Single Cell Li-ion Charging: Designed for 3.7V lithium-ion batteries including 18650 cells.
- Integrated Protection Circuit: Provides overcharge, over-discharge, and over-current protection.
- Adjustable Charging Current: Charging current can be configured according to battery capacity requirements.
- Micro USB Input: Convenient charging interface compatible with standard 5V USB power sources.
- LED Charging Indicators: Red LED indicates charging status, green LED indicates fully charged condition.
- Compact Design: Small PCB size suitable for portable and space-limited applications.
- High Charging Accuracy: Provides precise constant-current and constant-voltage charging control.
Principle of Operation:
The TP4056 charger uses a constant-current/constant-voltage (CC/CV) charging method to safely charge a single lithium-ion battery.
- Constant Current Stage: The module charges the battery with a controlled current until the battery voltage reaches approximately 4.2V.
- Constant Voltage Stage: The charger maintains 4.2V while gradually reducing charging current until the battery reaches full capacity.
- Protection Stage: The protection circuit disconnects the battery during abnormal conditions such as overcharge, over-discharge, or excessive current.
| Pin | Description |
|---|---|
| IN+ | 5V positive input |
| IN- | 5V ground input |
| B+ | Positive terminal of lithium battery |
| B- | Negative terminal of lithium battery |
| OUT+ | Protected battery output positive |
| OUT- | Protected battery output negative |
Wiring Example:
| Module | Connection |
|---|---|
| Micro USB / IN+ | 5V USB Power Supply |
| IN- | USB Ground |
| B+ | Battery Positive (+) |
| B- | Battery Negative (-) |
| OUT+ / OUT- | Power output for connected load |
Applications:
- 18650 lithium battery charging systems.
- Portable power supply projects.
- Battery-powered IoT devices.
- Arduino and ESP32 battery applications.
- Wearable electronics.
- DIY power banks.
- Embedded electronics requiring rechargeable batteries.
Specifications:
- Module Type: Lithium-ion Battery Charger with Protection
- Charging IC: TP4056
- Battery Type: Single-cell Li-ion / Li-Po
- Battery Voltage: 3.7V nominal (4.2V full charge)
- Input Voltage: 4.5V – 5.5V DC
- Charging Current: Up to 1A adjustable
- Charge Accuracy: ±1.5%
- Charging Method: CC/CV (Constant Current / Constant Voltage)
- Input Interface: Micro USB
- LED Indicator: Red charging / Green full charge
- Protection: Overcharge, over-discharge, over-current protection
- Dimensions: 25mm × 19mm × 10mm
Important Notes:
- Always verify correct battery polarity before connection.
- This module is designed for one-cell lithium batteries only.
- Charging current should be selected according to battery capacity (typically around 30–40% of battery capacity for safer charging).
- Do not connect batteries with a voltage higher than 4.2 V (full-charge voltage.