DIY 5V to 3.7V 10000mAh Battery Charger | Simple Circuit for Lithium-Ion Batteries | DIY

In this video, I will show you how to create a DIY battery charger to convert 5V input to 3.7V for charging a 10,000mAh lithium-ion battery. This charger is ideal for small projects and devices powered by 3.7V Li-ion batteries, such as mobile devices, portable speakers and more Uses..

Topics covered in this video:

*Components required for the charger circuit
*How to design and connect the circuit
*Step-by-step assembly guide
*Testing the charging circuit with a 3.7V battery


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Components used:

1) 5V input source (USB or adapter)

1) BD139 TRANSISTOR

2) 220 OHM RESISTOR (1) 330 OHM

1) LED

1) 10V /1000 uf cap.

1) 4.7v zenor diod

1) 3.7V lithium-ion battery

1) Connecting wires and tools


Stay tuned for more electronics tutorials!


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#electronic #battery