Single Li-Pol / Li-Ion Cell Charging Module

Miniature charging module for a single Li-Pol or Li-Ion battery cell (3.7 V), suitable for direct installation inside a device or model. The module weighs only 1.2 g and is ideal for applications using a single battery cell. It can also be used for charging multiple lithium cells connected in parallel.

The TP4056 5 V / 1 A battery charger module with a USB Type-C connector is widely used in prototyping boards, Arduino projects, control modules, and other electronic devices.

Charging status and full-charge condition are indicated by colored LED indicators.

Adjustable Charging Current

The charging current can be adjusted by replacing the programming resistor. Recommended resistor values and the corresponding charging currents are provided in the manufacturer's specification table.

Technical Specifications

• Input voltage: 4.5–5.5 V DC
• Input connector: USB Type-C
• Charging method: Linear
• Full-charge voltage: 4.2 V
• Charging current: 1 A (default)
• Charging current adjustment: By changing the resistor according to the manufacturer's table (resistor marked "R PROG")
• Charging accuracy: ±1.5%
• Charging indication:
  • Blue LED – Charging in progress
  • Red LED – Battery fully charged
• PCB dimensions: 22 × 17 mm