Final answer:
To form a battery bank, batteries can be connected in either series or parallel. Series connections increase the total voltage, while parallel connections increase the total capacity.
Step-by-step explanation:
In order to form a battery bank, batteries can be connected in two ways: in series or in parallel.
In series connections, the positive terminal of one battery is connected to the negative terminal of another battery. This increases the total voltage of the battery bank. For example, if two 6-volt batteries are connected in series, the total voltage will be 12 volts.
In parallel connections, the positive terminals of all the batteries are connected together, and the negative terminals are connected together. This increases the total capacity of the battery bank. For example, if two 2000mAh batteries are connected in parallel, the total capacity will be 4000mAh.