The difference between primary battery and secondary battery

Structurally, the secondary battery undergoes a reversible change in electrode volume and structure upon discharge, while the interior of the primary battery is much simpler because it does not require adjustment of these reversible changes.
The primary battery can only be discharged once, and the secondary battery can be repeatedly charged and discharged. The rechargeable battery has a reversible change between the electrode volume and the structure during discharge. The design must adjust these changes, and the internal battery is much simpler. Because it does not need to adjust these reversible changes, the mass-to-capacity ratio and volume-to-volume capacity of the primary battery are larger than that of the general rechargeable battery, but the internal resistance is much larger than that of the secondary battery , and the load capacity of the country is low. In addition, the self-discharge of the primary battery Far less than the secondary battery.