Power MOSFET IRLB3034PBF + Resistor
The best MOSFET for mod building. With sufficient power reserves for all cases.
Original from International Rectifier, directly from the USA. Allows the use of (almost) any fire button. But also highly recommended for high ampere fire buttons as safety.
The required 15k Ohm resistor is also included.
The adjustable temperature fuse MHP-TA15-9-72 is highly recommended for this purpose. Depending on the number of batteries (or amps), you will need one or two
If you use a rechargeable battery, the variation with a fuse is sufficient. This allows you to use currents of up to 15 amps. If you have two (parallel) batteries, please select the variant with two fuses and use one fuse per battery. You can then reach currents of up to 30 amps.