The difference between parallel and series connection of batteries is mainly the difference in voltage and capacity. Take a battery" target="_blank">lithium battery with a voltage of 3.7V and a capacity of 3000mAh, which is also two batteries. If there are two series, the model of the battery pack is: 7.4V /3000mAh, if it is two parallel, the model becomes: 3.7V/6000mAh. When connected in series, the voltage will increase but the capacity will not change, and when connected in parallel, the capacity will increase but the voltage will not change.

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