Mini MPPT Solar Charge Controller Module For 3.7V/4.2V Li-ion Batteries (18650) – 1A 5V Output

Got a small solar project?

This little module is perfect for charging 3.7V Li-ion batteries (like 18650s) up to 4.2V.

It uses MPPT technology to squeeze every drop of power from your solar panel.

You can choose the version with or without the pin header, depending on your setup.

It’s tiny—only about 18mm long—and weighs less than a gram, so it fits into almost any DIY project.

Input voltage is DC 4.4-6V, and it’ll charge at 1A.

Whether you’re building a solar light, a charger, or some kind of off-grid gadget, this board gets the job done.