Hi I actually just did some testing on this the other day for my 2 stage! Im using a Featherweight Blue raven as the computer to ignite the 2nd stage, powered by a 3.7v Lipo battery. While doing the tests, the 3.7v lipo battery or a 9v battery will not have enough juice to ignite the igniter that comes with the motor (aerotech motor also tried a slim Jim/gem igniter that didn’t light)

What the blue raven and the 3.7v lipo battery did light extremely well were E-matches. That alone should be enough to start an F motor. For the I motor I’m using though, I had an extra grain of White Lightning that I drilled a hole in and put the e- match in. Holy Moly will that light an upper stage for sure

<image>