Series vs Parallel Connection, Differences,
When batteries are connected in series, the positive terminal of one battery is connected to the negative terminal of another battery.
The voltage adds up while the capacity (ampere-hours) remains the same.
Batteries in Series
When batteries are connected in parallel, the positive terminals are connected together, and the negative terminals are connected together.
The total capacity of the battery bank increases, providing longer runtime.
Batteries in Parallel