Page 1
A toy, flashlight, or tablet can stop working once its battery runs out.
玩具、手电筒或平板电脑，都会在电池没电之后慢慢停下来。正文预览
Page 2
A battery stores energy in chemical form and releases it as electrical energy when a device needs power.
电池会把能量先储存在化学物质里，再在设备需要时把它变成电能释放出来。
Page 3
Inside the battery, materials react in ways that push tiny charged particles through a circuit.
在电池内部，材料会发生反应，推动带电粒子沿着电路流动。
Page 4
That moving electric current is what helps a light shine, a speaker sound, or a screen turn on.
这些流动的电流，才能让灯亮起来、让喇叭发声，或者让屏幕启动。
Page 5
As the battery works, the stored chemicals gradually change, so there is less ability left to keep the current flowing.
随着电池不断工作，里面储存能量的化学物质会慢慢发生变化，可继续供电的能力也就越来越少。继续看同类型内容
