A Li-ion battery is a type of rechargeable battery composed of cells in which lithium ions move from the negative electrode through an electrolyte to the positive electrode during discharge and back when charging. Li-ion cells use an intercalated lithium compound as the material at the positive electrode and typically graphite at the negative electrode.
source/image(PrtSc): Penguin DIY
In this video I show how to turn a non-rechargeable 1.5V battery into a rechargeable lithium battery at home and charge it with an adapter.
To make this rechargeable battery, we use a 3.7 volt lithium battery and bring it to 1.5 volts using a reducing regulator.
To charge the 3.7V battery, we use the charging module, but due to its inappropriate size, we have to remove it from the board and change it to smaller dimensions./Penguin DIY