DIY Car Charger: Portable Tool Charging Guide

How to DIY a car-mounted electric tool charger?

You'll need an automatic step-up/down constant current and voltage power supply module, with input ranging from 5.5V to 30V and output from 0.5V to 30V. It's compact, measuring 66mm in length, 48mm in width, and 21mm in height, making it perfect for use in a vehicle. I'm planning to use this to create a charger. Additionally, this module allows adjustment of both current and voltage, suitable for charging battery packs of different voltages.

Drill a hole on the side for the DC socket used as input.

At the bottom, drill four holes for securing the circuit board with motherboard standoff screws.

The output will use the common 5.5mm x 2.1mm plug. Test it with power applied.

The 12V battery is fully charged, ready for recharging.

After charging, you can neatly coil the cable and store it in a box.

Next, create a direct connection for the cigarette lighter socket.

Once completed, it's portable and compact enough to fit in a pocket.