USB Lithium 3.7V Battery Charging Module DC-DC Boost Step Up

$7.28 $8.61

USB Lithium 3.7V Battery Charging & DC-DC Boost Step Up Module

Power your DIY electronics projects with this compact and versatile USB Lithium Battery Charging Module. Designed for makers, hobbyists, and engineers, this all-in-one board combines a Micro USB lithium battery charger with a DC-DC step-up (boost) converter, letting you charge a 3.7V LiPo/Li-ion battery via USB while simultaneously providing a wide range of adjustable output voltages — all in a package smaller than a matchbox.

Whether you're building a portable power bank, a custom IoT device, or a field power supply for your electronics kit, this module delivers reliable, adjustable voltage output from a single compact board. Made in Mainland China.

Key Features

2-in-1 design: Charges a 3.7V lithium battery (up to 4.2V) AND boosts output voltage — all from one board
Micro USB input for easy charging from any standard USB power source
Wide adjustable output: 4.3V – 27V (continuously adjustable via onboard trimmer), supporting 5V, 9V, 12V, 24V and more
Stable charging voltage: DC 4.2V to safely charge lithium cells
Max charging current: 1A — fast and safe for single-cell LiPo/Li-ion batteries
Max discharging (output) current: 2A — suitable for a wide range of loads
Fine workmanship & quality components for consistent, dependable performance
Ultra-compact form factor: approx. 33 × 23 × 9 mm — fits neatly into any enclosure

Specifications

Input Voltage	4V – 8V (via Micro USB)
Output Voltage	4.3V – 27V (continuously adjustable)
Charging Voltage	DC 4.2V
Max Charging Current	1A
Max Discharging Current	2A
Module Dimensions	Approx. 33 × 23 × 9 mm

What's in the Box

1 × DC-DC Step Up Boost Module with Lithium Battery Charging Board

Perfect For

DIY portable power banks & battery packs
Arduino, Raspberry Pi & IoT projects
Custom USB-charged portable electronics
Field power supply conversions (5V, 9V, 12V, 24V)
Robotics and maker projects

Frequently Asked Questions

Q: Can this USB lithium charging module charge and boost output at the same time?

A: Yes! This module is designed as a 2-in-1 board — it charges a connected 3.7V lithium battery via Micro USB while the boost converter provides adjustable stepped-up voltage output from 4.3V to 27V simultaneously, making it ideal for portable DIY power applications.

Q: What output voltages does this DC-DC step up boost module support?

A: The output voltage is continuously adjustable from 4.3V to 27V using the onboard trimmer potentiometer. Common set points include 5V, 9V, 12V, and 24V, but you can dial in virtually any voltage within that range to suit your project's needs.

Q: What type of battery is compatible with this charging module?

A: This module is designed for single-cell 3.7V lithium-ion or LiPo (lithium polymer) batteries, charging them to a safe maximum of 4.2V at up to 1A. Always ensure your battery's capacity and C-rating are matched to the module's specifications for safe operation.

Q: What is the maximum current output of this boost module?

A: The module supports a maximum discharging (output) current of 2A. For best performance and longevity, avoid sustained loads at or near the maximum current rating and ensure adequate airflow around the module.

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.