Solar Li Ion Battery Charger Circuit

In this diy project i will show you how to design and build a simple but effective solar battery charger for 18650 batteries.

Solar li ion battery charger circuit.

Now the circuit works perfectly so we can move to make a suitable enclosure for this. Here is a tried and tested sample circuit of a li ion battery charger that can be used to charge any 3 7v li ion battery using a 5vdc usb solar panel power supply. The smd leds are fully safeguarded thermally and from over current using an inexpensive lm 338. Described below is the do it yourself project of an inexpensive single cell 1s 3 7v lithium ion li ion battery charger circuit principally designed for the cylindrical 18650 edition.

The 3rd idea teaches us how to build a simple solar led with battery charger circuit for illuminating high power led smd lights in the order of 10 watt to 50 watt. Introduction the need for sustainable living has led to the increased usage of renewable energy. At the heart of the circuit is one microchip mcp73831 available in sot 23 5 package. Insert a 18650 li ion battery to the battery holder now you will see the battery voltage and charging current on meter display rotate the potentiometer knob slowly to adjust the charging current.

For getting a controlled charging supply. The 18650 cells are one of the most prevalent types of lithium ion battery cells. After making the circuit we need to test it.