What Are the Differences Between Primary Batteries and Secondary Batteries?

The main difference is that the active material is different. The active material of the secondary battery is reversible, while the active material of the primary battery is not. The self-discharge of the primary battery is much smaller than that of the secondary battery. But the internal resistance is much larger than that of the secondary battery, so the load capacity is lower. In addition, the mass specific capacity and volume specific capacity of the primary battery are larger than those of general rechargeable batteries.