1. When dry batteries are connected in series, because each dry battery has electromotive force and internal resistance, the advantage of connecting dry batteries in series is that it can provide a higher voltage; the disadvantage is that its internal resistance is relatively large, so that the power and current it provides are limited. Influence.

2. After the dry batteries are connected in parallel, because the parallel connection can reduce the internal resistance of the battery pack, it can provide a larger current and power; the disadvantage is that the voltage it provides is only equivalent to the voltage of a dry battery.

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