Mini USB Power Bank Circuit | 5V 1A Output | DIY Portable Battery Charger Module 1 pcs (1 pcs)

Product Description

This Mini USB Power Bank Circuit is a compact and efficient module designed to convert lithium-ion batteries (3.7V) into a 5V USB output for charging mobile devices, small electronics, or microcontroller projects.

It features overcharge, over-discharge, and short-circuit protection, making it safe and reliable for DIY power banks. Its small size and simplicity make it perfect for hobbyists, electronics projects, and portable battery solutions.