Ruslan started to streaming in his Youtube channel "Ruslan K", he doesn't like to make videos, he wants streams only, I could to save his streams. As seen, he removed every video on his channel, and he is hurry to remove these streams too, but fortunatelly Youtube usually saves all streams automatically, until manual remove. Well, in one of his streams, at some moments, he shows his flashlight. His argument is, that flashlight works at least 1 day without touching it, so it must to work until the pot-core is destroyed/disintegrated. Supposedly his flashlight must to light and keep doing it. He was supposed to not turn it off, it is also a part of the argument. BUT accidentally (I think), on the upper side (looks like shelf to me) he had a reflected his desktop table in it, you can see a bit what he does with flashlight before to show it to the camera (he wants just to show that it is still lighting), and he did it like 3-4 times. Well, in the reflection you can see this flashlight, and it is clearly not lighting, every time he tooks it, he activates some switch (not by putting 9v battery) and instantly the flashlight starts to light, he does it before to show it to the camera. After showing it, he puts it back at the desktop table, you see it in the reflection of the shelf, and before to remove the hand from the flashlight, he clearly turns it off. Then, someone asks him if the flashlight is still lighting, and he (Ruslan) says yes, and brightly (you see no light on it). When he shows it again to the camera, he does the same, he puts the hand on it and turns it on with some switch (not by putting 9v battery) (you see it in the reflection of the shelf), and again, when he puts it back at the table, you see that he turns it off. It looks like some hidden circuit with battery inside the flashlight (not some hidden supercapacitor).

See how he turns on and off the flashlight:

2:03:54 to 2:05:15

2:14:43 to 2:15:00

2:53:14 to 2:53:25

3:29:35 to 3:29:47

3:51:22 to 3:51:55