How to perfectly solder a wire without a soldering iron

It is almost impossible to make a reliable connection of wires without soldering. No matter what anyone says, but soldering wires is the most reliable, strong and durable connection of all possible. Unfortunately, it is not always possible to use it, say, in a car or motorcycle, due to the lack of a soldering iron (or the lack of a low-voltage or gas sample).
But there is a small life hack on how this can be done using a regular lighter.

Will need

Tubular solder with flux with a diameter of 0.7 mm - .
Liquid flux.
Lighter.

Everything can be bought at any radio store or ordered at AliExpress.

Reliable soldering of wires without a soldering iron

First of all, we strip the insulation and expose the cores of the connected wires. Approximately 1.5-2 cm from each end.

If you then insulate with heat shrink, we recommend putting it on one of the ends first.
We twist with each other. Place one on top of the other and turn it in different directions with your fingers.

Tubular solder with flux (the flux is located in the solder tube itself).

We take a piece of solder approximately 5 cm long and screw it onto the connection.

Here's the main secret: You need to make 3 turns of solder near the first end, then just lay the solder and make 3 turns at the second end. See photo.

This must be done so as not to overheat the wire insulation, since we will heat the middle, and as soon as the melting temperature reaches the ends, the solder itself will spread.
Drop a drop of liquid flux into the middle.