1.After operating, the converter should be encapsulated via epoxy resin or insulated wax so that it can be used for a long period of time. When it operates without load, it will not get damaged
2.The input voltage is 3.7V, thst is 18650 battery voltage. If you want to increase the input voltage (increase to 12V), you need to increase the resistance value of feedback resistor, or the triode will be burnt. The feedback resistance increases to 150 ohm-1.5K ohm., its value should be adjusted from high to low
3.The converter 15KV is the highest output, so its limit output should be not more than 15KV, that is 1.5cm arc
4.Before soldering, please remove the paint on the enameled wire soldering part
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