Small scale biochar in a can

I just took some pictures of a process I have been using to make small scale, high quality (I think?) biochar from some willow wood shavings:

I think I saw this from David The Good originally. He mentioned he learned it from someone else though—I’ll have to go get the video.

I like that this uses no extra energy than for heating and very little extra effort.

I had previously been getting coals out and quenching them in water, but I didn’t think the quality of biochar was as good—very hard and rigid, which makes me think not so porous. Willow is also a softer wood so that may help.

The biochar makes a very musical, clinky sound which as far as I remember indicates a high quality.

This is the video where I saw something like the technique. I haven’t seen it in a while so maybe it’s a bit different: