DC 5V 2.1A DIY Power Board 18650 Charge Discharge Boost Module
DC 5V 2.1A DIY Power Board 18650 Charge Discharge Boost Module
DC 5V 2.1A DIY Mobile Power Board — 18650 Lithium Battery Charge/Discharge Boost Module
Build your own portable power bank or custom electronics project with this versatile DC 5V 2.1A DIY Mobile Power Board. Designed for 3.7V lithium 18650 cells, this all-in-one integrated module handles charging (up to 4.2V), boost discharge output (5V/2.1A), battery protection, and a built-in charge indicator — everything you need in a compact, single-board solution.
Whether you're a hobbyist, maker, or electronics enthusiast, this module streamlines your DIY power supply builds with reliable circuitry and multiple available styles to match your specific project needs.
Key Features
- 5V / 2.1A Output: Boost converter delivers a stable 5V DC output at up to 2.1A — ideal for charging USB devices and powering microcontrollers.
- 4.2V Lithium Charging: Safely charges 3.7V 18650 lithium cells up to 4.2V with built-in charge management.
- All-in-One Design: Combines charge, boost discharge, battery protection, and LED indicator functions on a single board.
- Multiple Style Options: Available in a wide range of configurations — including 18650 discharge boards, TP4056 kits, 5V output modules, Li-ion protection boards, charge/discharge combo modules, and more.
- Electrostatic Bag Packaging: Shipped in an anti-static bag to protect sensitive components during transit.
- Compact & Lightweight: Small form factor fits easily into custom enclosures and DIY project housings.
Module Specifications
- Input Voltage: 5V DC (USB)
- Output Voltage: 5V DC (boosted)
- Output Current: Up to 2.1A
- Battery Compatibility: 3.7V lithium 18650 cells (charged to 4.2V)
- Model: 5V Charging and Discharging Integrated Module
- Package: Electrostatic (anti-static) bag
- Certification: None
Style Variants Available
- 18650 Discharge Board
- 4.2V Charge Protection Board
- Charge Discharge Module
- Charging Protection Module for 18650
- 18650 5V Output Board / Module
- 18650 Charger Board Module
- 18650 Protection Module
- 18650 2A Charge Module
- TP4056 Kit
- Li-ion Protection Board 5V
- PD GC4 Module
- And more — see variant selector above
Perfect For
- DIY portable power bank builds
- Arduino, Raspberry Pi, and microcontroller power supply projects
- Custom battery-powered electronics enclosures
- Maker spaces, electronics labs, and hobbyist workshops
- Prototyping and educational electronics projects
For general guidance on safe lithium battery handling in DIY electronics, visit the U.S. Consumer Product Safety Commission (CPSC) – Lithium Battery Safety.
Frequently Asked Questions
Q: What does the DC 5V 2.1A DIY Mobile Power Board do?
A: This all-in-one module combines four functions on a single PCB: it charges a 3.7V 18650 lithium cell up to 4.2V, boosts the battery output to a stable 5V DC at up to 2.1A, provides built-in battery protection (overcharge/over-discharge/short circuit), and includes an LED charge status indicator — making it ideal for DIY power bank and portable electronics builds.
Q: Which 18650 battery types are compatible with this module?
A: This board is designed for standard 3.7V lithium-ion 18650 cells. It charges them safely to 4.2V. Always use quality, protected or unprotected 18650 cells from reputable sources, and follow proper lithium battery handling guidelines for safe DIY operation.
Q: What projects can I build with this charge/discharge boost module?
A: This module is widely used in DIY portable power banks, custom USB charging stations, Arduino and Raspberry Pi battery power supplies, wearable electronics, and any maker project requiring a compact, self-contained 5V lithium battery management solution.
Q: How is this module shipped and packaged?
A: Each module is packaged in an electrostatic (anti-static) bag to protect the sensitive electronic components from electrostatic discharge (ESD) during shipping and handling.