The Ideal Scenario
2. When Everything Just Works
In a perfect world, all voltage sources would be identical. They'd have the same voltage rating, the same internal resistance, and they'd always be in tip-top shape. If you connect two identical voltage sources in parallel, magic happens (well, not real magic, but pretty close!). They'll both contribute equally to the load, and you'll effectively double the current capacity of your power supply.
Imagine you have two 1.5V batteries, each capable of supplying 1 Amp of current. Connect them in parallel, and voila! You now have a 1.5V power source capable of supplying 2 Amps. This is super handy for powering devices that need more current than a single battery can provide.
This parallel setup also enhances the longevity of your power supply. Because each voltage source is sharing the load, they won't discharge as quickly. It's like having two marathon runners taking turns leading the race; they'll both last longer than if one runner tried to do it all alone.
However, the real world is rarely ideal. Batteries age differently, have slightly varying internal resistances, and might not always be perfectly matched. This leads us to the less-than-perfect, but far more common, scenario.
