What's the difference between primary battery & rechargeable battery?

The electrochemistry inside primary Battery determines whether Battery is rechargeable or not. Based on their electrochemical composition and electrode structure, the reactions between the internal structures of a true rechargeable Battery are reversible.

In theory, this reversibility is not affected by the number of cycles, since the charge and discharge will cause reversible changes in the volume and structure of the electrode, then the internal design of the rechargeable battery must support this change, since, one-shot battery do not discharge, its internal structure is much simpler and does not support this change, therefore, one-shot battery can not be charge, This is very dangerous & uneconomical. If you need to use it time and again, you can  choose a rechargeable battery with a true cycles of approx.1,000-2000.