Calling all DIY enthusiasts and tinkerers! This Onyehn 5V Boost Step-Up Module is a must-have for your projects. Each pack includes 5 boards that let you charge and protect lithium batteries (like 18650, polymer, or phone batteries) with ease. They support input up to 5V 1A and output 5V 1.2A, so you can power LEDs, USB devices, and more. Just connect your battery in parallel (not in series!) and you’re good to go. The board comes with over-charge, over-discharge, and over-load protection, keeping your gadgets safe. Note: You might get the older version with a red charging light or the newer one without lights—both work great. Perfect for building custom chargers, portable power banks, or small electronics. It’s compact (22x17x11mm) and easy to solder, but remember: connect B+ and B- correctly! Whether you’re a hobbyist or a pro, these modules are super handy and reliable.
