USB 18650 Li-ion Battery Charger & Step-Up Boost Module
USB 18650 Li-ion Battery Charger & Step-Up Boost Module
USB 18650 Lithium Battery Charger & Adjustable Step-Up Boost Module
This compact and versatile USB lithium battery charger module is the perfect solution for DIY electronics enthusiasts and makers. It combines a Li-ion/LiPo 18650 battery charger with an adjustable step-up (boost) converter in a single, easy-to-use board. Whether you're building a portable power bank, a solar charging project, or converting a device to run on lithium batteries, this module delivers reliable performance in a tiny package.
Key Specifications
- Input Voltage: 4.5V – 8V DC (USB or solar panel compatible)
- Output Voltage: 4.3V – 27V DC (adjustable)
- Charging Voltage: 4.2V DC (ideal for 3.7V 18650 cells)
- Charging Current: Up to 1A
- Discharging Current: Up to 2A
- Boost Output Range: Selectable steps — 5V, 9V, 12V, 24V and more
- Made in Mainland China
How It Works
Connect your 5V input (such as a USB source or 5V solar panel) to the VIN+ terminal. The BAT+ terminal outputs a regulated 4.2V charge current to your 3.7V 18650 lithium cell. The OUT+ terminal delivers your chosen adjustable boost voltage — making it ideal for powering devices that require 5V, 9V, 12V, or even up to 24V from a single lithium cell.
A great practical use: connect a 5V solar panel to the input, charge an 18650 battery, and simultaneously power a higher-voltage device from the boost output. Also suitable for converting multimeters and other portable tools to run on rechargeable lithium batteries.
Features
- All-in-one charge + boost design — fewer components, cleaner builds
- Wide adjustable output range: 4.3V to 27V DC
- Compatible with standard 3.7V Li-ion / LiPo / 18650 cells
- Compact PCB board — easy to integrate into custom enclosures
- USB-compatible input for convenient bench or solar charging
- Suitable for DIY power banks, robotics, portable electronics & more
Package Contents
- 1× Lithium Li-ion Battery Boost Charger Module (New Version)
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Frequently Asked Questions
Q: What types of batteries can this 18650 charger module charge?
A: This module is designed for standard 3.7V lithium-ion (Li-ion) and lithium polymer (LiPo) cells, including popular 18650 format batteries. It delivers a regulated 4.2V charging voltage at up to 1A — the correct charge profile for most 3.7V lithium cells.
Q: Can I use a solar panel as the input source for this charger module?
A: Yes! The module accepts any 4.5V–8V DC input, which makes it fully compatible with 5V solar panels. Simply connect your solar panel to the VIN+ terminal and the module will manage charging your 18650 battery while simultaneously providing adjustable boost output from the OUT+ terminal.
Q: What is the adjustable output voltage range of the step-up boost converter?
A: The boost output is adjustable from 4.3V up to 27V DC, allowing you to select common voltages such as 5V, 9V, 12V, and 24V to power a wide variety of devices and DIY electronics projects from a single lithium cell.
Q: Is this module suitable for building a DIY portable power bank?
A: Absolutely. The combination of a lithium battery charger and a step-up boost converter on one board makes it an excellent foundation for custom DIY power banks. You can charge the internal 18650 cell via USB or solar input and output a stable 5V (or other voltage) to power your devices.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.