TP4056 1A Lithium Battery Charger Module (Type-C, Unprotected)

Description

Product Overview

The TP4056 1A Lithium Battery Charger Module is a compact, low-cost charging solution designed for single-cell lithium-ion and lithium-polymer (LiPo) batteries. This version features a USB Type-C input for modern connectivity and leaves out the protection circuit, giving you direct access to the battery terminals for custom integration.

Based on the industry-standard TP4056 chip from Top Power ASIC, this module implements a Constant Current / Constant Voltage (CC/CV) charging algorithm—the correct method for safely charging lithium batteries . It automatically delivers the maximum preset current (1A by default) until the battery reaches 4.2V, then switches to constant voltage mode, gradually reducing the current until the battery is fully charged .

What “Unprotected” Means: Unlike the common version with a DW01 protection IC, this module exposes the battery terminals directly (B+/B-). The protection circuit (which provides over-discharge and over-current protection) is not present. This is ideal for applications where you are connecting a battery that already has its own built-in protection circuit, or when you need direct access to the battery for custom power management .

The Type-C connector supports modern cables, but users have reported that some Type-C to Type-C cables (especially those used for laptops) may not work due to missing USB-C PD (Power Delivery) negotiation resistors. For reliable power, it is recommended to use a standard 5V USB-A to Type-C cable or solder direct wires to the IN+ and IN- pads .

Whether you are building portable electronics, powering an Arduino project with battery backup, or maintaining 18650 cells, this TP4056 module offers a simple, ready-to-use charging solution at a fraction of the cost of dedicated chargers.

Key Features

• USB Type-C Input: Modern connector format, compatible with reversible plug orientation (Note: Use USB-A to Type-C cables or 5V adapters for best compatibility)

• No Protection Circuit: Exposes direct battery terminals (B+/B-), ideal for batteries with built-in protection or custom power management circuits

• 1A Maximum Charge Current: Default charge current of 1000mA (1A), adjustable by changing the programming resistor (RPROG) for lower current applications

• CC/CV Charging Algorithm: Implements proper Constant Current / Constant Voltage charging method essential for lithium battery safety and longevity

• Dual-Color Status Indicator: Red LED indicates charging in progress; Green LED indicates fully charged or no battery connected

• Preset 4.2V Charge Voltage: ±1.5% accuracy ensures battery is charged to the correct full voltage without risk of overcharging

• Automatic Recharge: When a fully charged battery drops below 4.05V (approximately 80-90% capacity), a new charging cycle automatically begins

• Thermal Regulation: Automatically reduces charge current if internal die temperature exceeds safe limits, protecting the chip during high-current charging

Technical Specifications