18650 Battery Shield V8 (1 / 2 / 4 Slot) – 5V/3A Power Module with Micro USB | Mobile Power for Arduino, ESP32, ESP8266

A versatile 18650 Battery Shield V8 designed to provide stable and portable power for your electronics and IoT projects. Supporting 1, 2, or 4 battery slots, this module allows you to build flexible power solutions for Arduino, ESP32, ESP8266, and other development boards.

With built-in voltage regulation and USB output, this board can act as both a power supply module and a DIY power bank, delivering reliable 5V output for your devices.

Available variants

• 1 Slot – Compact and lightweight, ideal for low-power projects
• 2 Slot – Balanced capacity and portability
• 4 Slot – Maximum runtime for power-hungry applications

Key features

• Supports 18650 lithium-ion batteries
• Multiple configurations: 1 / 2 / 4 slot options
• 5V output up to 3A for powering devices
• 3.3V output up to 1A for low-voltage modules
• Micro USB input for charging batteries
• Built-in protection circuits (overcharge, over-discharge)
• LED indicators for battery status
• Can be used as a portable power bank

Pinout & connectivity

• Micro USB – Charging input
• USB output – 5V power output
• 5V / 3.3V pins – Regulated output for circuits
• GND – Ground

Specifications

Common applications

• Portable Arduino and ESP32 projects
• DIY power banks
• IoT and wireless sensor nodes
• Robotics and mobile electronics
• Backup power systems
• Embedded system prototyping

Which variant should you choose?

• 1 Slot – Small, portable, low current usage
• 2 Slot – General-purpose projects
• 4 Slot – Long runtime and higher current needs

Important: Use high-quality 18650 batteries and ensure correct polarity when inserting cells. Batteries are not included.