Intro: How to Make a 18650 Lithium-ion Battery Charger
In this instructables I will show you how to make a 18650 battery charger
Step 1: More Details in This Video
Step 2: Take a Paper Clip
Take a paper clip and take a part of the clip and bend like shows in the image
Step 3: Soldering Paper Clip
Take a pcb and take a 18650 battery as a measurement and mark it.solder paper clip well.
Take a thin steel wire and place it on sides of battery. Then make another one like that.
Step 5: Mark + and -
Step 6: Tp4056 Module
Tp4056 module is the main part of our project.glue module to pcb by using hot glue or double side tape. Connect b+ to positive of battery and b- to negative of battery.
Now it's ready to charge battery. Simply place battery inbetween the paper clips and connect any 5v power source here Iam using my diy power to charge the batteries.