Stan's battery operated at 2.5V, an improvement over other batteries of the day.

斯坦利的电池，其工作电压能提高到2.5伏，这比当时的电池有所进步。

Today's batteries operate under the same principle as the very first voltaic cell.

今天的电池工作方式相同 作为第一个伏打电池的原理。

Also make sure you have plenty of batteries and a battery operated radio, as well as flashlights.

还要确保你有足够的电池和电池供电的收音机，以及手电筒。