While a battery’s purpose is to provide a steady voltage, its inner workings still contain conductive materials that will naturally lose energy as heat.

虽然电池的目的是提供稳定的电压， 但其内部结构仍然包含导电材料， 这些材料会自然地以热量的形式损失能量。

While a battery's purpose is to provide a steady voltage, its inner workings still contain conductive materials that will naturally lose energy as heat.

虽然电池的目的是提供恒定电压，但其内部工作仍然包含导电材料，这些材料会自然地以热量的形式损失能量。