In this tutorial, I am going to show you how to charge a Lithium 18650 Cell using TP4056 chip utilizing the solar energy or simply the SUN.
Wouldn’t it be really cool if you can charge your mobile phone’s battery using the sun instead of a USB charger? You can also use this project as a DIY portable power bank.
The total cost of this project excluding the battery is just under . The battery will add up another to bucks. So the total cost of the project is somewhat around.