The TP4056 is a highly compact, linear charging module designed for single-cell lithium-ion batteries. This version features a Micro USB port, making it compatible with most standard smartphone chargers and computer USB ports. It is the industry-standard solution for adding reliable charging capabilities to DIY electronics and portable devices.

Specifications

• Charging Method: Linear charge
• Default Charging Current: 1A (Adjustable via R_PROG resistor)
• Charging Accuracy: 1.5%
• Input Voltage: 4.5V to 5.5V
• Full Charge Voltage: 4.2V
• Input Interface: Micro USB (Includes additional solder pads for hardwiring)
• Operating Temperature: -10°C to +85°C
• Polarity Reversal: Not Allowed (Inverse polarity will damage the module)

Features

• Adjustable Current Control: While the module comes pre-set to 1000mA (using a 1.2k resistor), the current can be tuned between 50mA and 1000mA by replacing the R_PROG resistor to suit smaller battery capacities.
• Visual Status Monitoring: Equipped with dual LEDs for clear status tracking:
  • Red LED: Active charging.
  • Green/Blue LED: Charging complete.
• Optimized Charging Profile: Automatically manages the constant-current to constant-voltage transition, ensuring the battery is charged safely and to its full potential.
• Compact Integration: Its small footprint allows it to be easily integrated into 18650 battery banks, flashlights, and handheld gadgets.