我们可以用前面的方法做更多的柠檬电池，并用金属线将他们之间的正负极连接起来来让电压加成。
Building more lemon batteries and connecting them with a metal wire from "+" to "-" adds the voltage from each cell.
由平点后面出来的线必须被连接到电池的负极。另外一根则连接到正极。
The wire that comes out beside the flat spot must connect to the "-" side of a battery, the other wire to the "+" side.
接电源时，要将控制器的红色线夹接‘正极’，绿色线夹接‘负极’。
The red cable of controller should clamp the positive electrode and the green cable of controller clamp the cathode when connecting the power.
电加热金属棒端部设置电源线连接柱通过导线与车辆电瓶电源正负极相连 接。
A connecting pillar of electrical main is arranged on the end part of the electric heating metal rod and is connected with anode and cathode of a vehicle battery jar.
电加热金属棒端部设置电源线连接柱通过导线与车辆电瓶电源正负极相连 接。
A connecting pillar of electrical main is arranged on the end part of the electric heating metal rod and is connected with anode and cathode of a vehicle battery jar.
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