When Germany sun battery voltage to the low limit, alarm notifies the user, and then automatically shut down to prevent the sun battery deep discharge in Germany.
当德国阳光蓄电池电压降到低限时，报警通知用户，然后自动关机以防止德国阳光蓄电池深度放电。
2
Discharge tube: a closed insulating vessel containing a gas at low pressure through which an electric current flows when sufficient voltage is applied to its electrodes.
放电管：装有低压气体的封闭绝缘容器，当电极有足够的电压时，通过它电流就开始流动。
3
The advantages of primary lithium battery are high voltage, stable discharge curve, broad application temperature range, long shelf life, low self discharge rate, etc.