18650 Li-ion UPS Charger Boost Module 5V/12V

Keep your projects powered without interruption with this compact 18650 Lithium Battery UPS Charger Boost Module — the ideal power solution for makers, hobbyists, and embedded systems designers. This intelligent module combines a lithium battery charger and a DC-DC step-up booster into a single board, enabling true UPS (Uninterruptible Power Supply) functionality. Simply connect an 18650 cell, and the module simultaneously charges the battery while delivering a stable regulated output — ensuring your device never loses power during supply interruptions.

Available in two variants to suit your project needs: a 5V 3A (15W) version perfect for powering Raspberry Pi, Arduino, and USB-based systems, and a 12V 1.2A (15W) version ideal for 12V-dependent devices and sensors. Both variants support fast charging and feature overcharge, over-discharge, and short-circuit protection for safe, reliable operation.

Whether you’re building a portable device, an IoT node, or a DIY backup power system, this module delivers professional-grade power management in a breadboard-friendly form factor.

Specification:

• Input Voltage : 4.5V – 5.5V (USB / DC)
• Battery Type : 18650 Lithium-Ion (3.7V)
• Charging Current : Up to 1A (adjustable)
• Output Voltage : 5V (Variant 1) / 12V (Variant 2)
• Output Current : 3A Max (5V) / 1.2A Max (12V)
• Output Power : 15W Max (both variants)
• Boost Topology : DC-DC Synchronous Step-Up
• UPS Function : Yes – simultaneous charge & output
• Protection : Overcharge, Over-discharge, Short Circuit
• Indicator : LED Charge & Output Status
• Operating Temp : 0°C – 40°C
• Module Size : Approx. 34mm × 23mm