Description
TP4056 Battery Charger with Integrated Boost Converter
The TP4056 with Boost is a versatile 2-in-1 power management module. It combines a dedicated TP4056 lithium battery charging circuit with a DC-DC boost converter. This module is designed to charge a 3.7V Lithium-ion cell (via Micro/USB-C) and simultaneously provide a stable 5V output to power your electronics.
Technical Specifications
| Feature | Specification |
| Charging IC | TP4056 |
| Boost Converter Output | Typically 5V (Adjustable on some models) |
| Input Voltage | 5V (via USB port) |
| Charging Current | Up to 1A (adjustable via resistor) |
| Battery Voltage | 3.7V Li-ion / Li-Po |
| Protection | Overcharge, Over-discharge, Over-current |
| Efficiency | ~85%–90% (Boost section) |
How It Works
This module serves two primary functions:
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Charging (TP4056): When connected to a 5V USB power source, the TP4056 chip charges the attached 3.7V battery using the standard Constant Current/Constant Voltage (CC/CV) profile.
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Boosting: The onboard DC-DC boost converter takes the 3.7V from the battery and steps it up to a stable 5V, which is then provided at the output pins or USB port to power your project.
Key Features
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Integrated Protection: Includes built-in protection for the battery, cutting off charging at 4.2V and discharging at 2.4V–3.0V, which is essential for cell longevity.
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Dual Status LEDs: Most modules feature two LEDs—one to indicate charging status (Red) and one to indicate that charging is complete (Blue/Green).
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Space-Saving: By combining the charger and booster on a single board, you significantly reduce the footprint of your project’s power management system.
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Self-Regulating: The boost converter maintains a steady 5V output even as the battery voltage drops during use.
Important Installation & Safety Guidelines
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Polarity Matters: Always double-check the battery polarity (B+ and B-) before soldering. Reverse polarity can permanently damage the TP4056 chip.
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Boost Load Limits: While the TP4056 handles 1A charging, the boost converter often has a lower current limit (typically 0.5A to 1A). Do not attempt to pull high current (like driving heavy motors) directly from the boost output.
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Heat Management: The TP4056 chip will get warm during the 1A charging cycle. This is normal, but ensure the board is not trapped in an airtight enclosure while charging.
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Simultaneous Use: Some versions of this board are designed for “pass-through” charging, meaning you can charge the battery and power the load at the same time. Check your specific module’s datasheet, as some cheaper variants may not support this reliably.

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