有两个LED指示灯前面板：电源和电池充电。
There are two LED indicators on the front panel : Power and Battery Charge.
电量显示：按下按钮，有5个LED指示灯显示电量，当只有一个或是两个LED灯，应该及时充电。
Battery capacity display: press the button, there are 5 LEDS displaying the battery capacity, if there is only one or two LEDS, it needs to be charged in time.
电量显示：按下按钮，有5个LED指示灯显示电量，当只有一个或是两个LED灯，应该及时充电。
Battery capacity display: press the button, there are 5 LEDS displaying the battery capacity, if there is only one or two LEDS, it needs to be charged in time.
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