This is useful for battery charging, but - you'll notice how "lumpy" the DirectCurrent looks on the scope.
这是有益的电池充电，而且-你会发现如何“块状”直流期待的范围。
2
Battery CHARGER, an electrical device supplied with alternating current, which produces a directcurrent output for charging the battery on the airplane.
It has glow caution light, nightlight, directcurrent output function that could emergency charging for mobile phone, digital goods and so on and has FM radio function.