Battery Shield - (Wemos D1 Mini)

This power shield is designed specifically for the Wemos D1 Mini board. It allows you to connect a Lithium-Ion or Lithium-Polymer battery (3.3-4.2 V) and manages its charging via a 5 V USB port, making your project autonomous and portable.

The module integrates a charge management circuit as well as a boost converter to provide a stable 5 V output up to 1 A, compatible with the native power supply of the Wemos D1 Mini. Two LEDs indicate the status: red for charging in progress and green when fully charged.

Technical Specifications

• Charging input voltage: 5 V (recommended) to 10 V max
• Maximum charging current: 1 A
• Supported Lithium battery voltage: 3.3 - 4.2 V
• Boost output voltage: 5 V / 1 A max

Pinout

Note: This shield mounts directly onto the Wemos D1 Mini pins. Ensure you use a Lithium battery in a compatible form factor (often 102040 or 103040 depending on the holder).