1. Voltage Remains the Same: When batteries are connected in parallel, their voltages add up, but their capacities (measured in amp-hours) combine. In this case, two 12V batteries remain at 12 volts.
2. Capacity Doubles: By connecting the batteries in parallel, the total capacity increases. If each battery has a capacity of, say, 10 amp-hours, the parallel connection yields a battery with a capacity of 20 amp-hours. This means you can draw twice as much current for the same duration or run your devices for twice as long compared to using a single battery.
3. Current Distribution: When connected in parallel, the batteries essentially act as one larger battery. When you draw current from the parallel arrangement, both batteries contribute equally to supplying that current. This helps avoid overloading or draining one battery faster than the other.
The advantage of connecting batteries in parallel is the increase in total capacity while maintaining the original voltage. However, if your goal is to increase voltage, you should instead connect batteries in series. Remember to follow proper battery connection guidelines to ensure safety and optimal performance.