What’s the difference between 3.2V and 3.7V lithium batteries

Sometimes when you look for lithium batteries, you may notice there are 3.2V and 3.7V lithium batteries. Maybe you found it a little difficult to understand. Do you know the difference between them? The main reason is that they are made from different materials.  Lithium batteries of 3.2V are lithium iron phosphate batteries, whose positive electrodes are mainly made of chemical LiFePO4. Due to the…