I tested the module I received. With 7.4 volts input, the secondary would jump an air gap of 4cm maximum. At 4.3cm gap, the module would internally spark. The DC output measured about 36KV when discharging at a 4cm gap. The module seems to be fairly robust with nice long leads.

I tested the module I received. With 7.4 volts input, the secondary would jump an air gap of 4cm maximum. At 4.3cm gap, the module would internally spark. The DC output measured about 36KV when discharging at a 4cm gap. The module seems to be fairly robust with nice long leads.

I tested the module I received. With 7.4 volts input, the secondary would jump an air gap of 4cm maximum. At 4.3cm gap, the module would internally spark. The DC output measured about 36KV when discharging at a 4cm gap. The module seems to be fairly robust with nice long leads.

The spark more than 3 cm if you use lipo 3s

The spark more than 3 cm if you use lipo 3s

The spark more than 3 cm if you use lipo 3s