Видео с ютуба How Can I Make My Battery Charger

Convert Your Old Computer's Power Source to a Battery Charger - You Haven't Seen This Method Before

How to Make 3.7v Battery Charging Auto Cut Off Circuit, Top 2

Аккумулятор RYOBI 18 В не работает? [Простой способ зарядки своими руками]

Why I made my own battery charging module (no TP4056)