Just when he was at a loss, his eyes couldn't help but fall on a flashlight on the table. This flashlight is the kind used for ordinary home lighting, and it can fit two No. 5 batteries.

What happens if you stuff a "lump of coal" into this battery?

Li Shan couldn't help but be taken aback by his bold idea. As for why he had this thought, he himself couldn't say clearly, that is, he was so flashy, a subconscious thought.

When he was a child, Li Shan once disassembled a similar battery, and later learned some of the principles of the battery through the teacher's explanation in the physics class at school.

This kind of battery is also commonly known as dry battery, most of this kind of battery is manganese-zinc battery, the middle is a positive carbon rod, a mixture of graphite and manganese dioxide is covered, and then a layer of fiber network is outside. The net is coated with a thick electrolyte paste, which consists of an ammonia chloride solution and starch, with a small amount of preservative.

Li Shan put the battery on the table, and then carefully cut the metal skin of the battery with a blade, revealing some liquid from the notch, which is the electrolyte paste.

Li Shan carefully poured a small piece of coal that had been basically ground into powder in advance, and then used a bamboo toothpick to completely press them into the gap, looking at it almost, and then firmly sealed the gap with welding glue.

In this way, even if the transformation of the battery is completed, as for what effect will be produced after assembly, Li Shan himself has no bottom in his heart.

After feeling that the pulverized coal and the electrolyte were completely fused, Li Shan put the battery into the flashlight.

He pointed the assembled flashlight at the wall in front of him, and then pressed the switch, only to see a dazzling white light appear in front of him, which instantly illuminated the entire house, and its brightness was so strong that Li Shan couldn't help but close his eyes, and at the same time, there was a slight explosion in his ears.

The strength of the light made Li Shan's eyes blind for a while, which was a bit like the effect of flashbangs used by special forces to rescue hostages.

It took a long time for Li Shan's eyesight to return to normal, and when he reopened his eyes, the light in the room had returned to normal.

Where did that pop sound come from?

Li Shan subconsciously looked at the flashlight in his hand, but found that the light bulb inside had been broken.

This should not be caused by an external force, but the outermost glass of the flashlight is intact, which means that it is not an external force that causes the damage to the bulb.

I touched the flashlight and felt that there was still some residual warmth on it.

Could it be that the voltage is too high and the bulb can't withstand it?

The possibility exists. Before the bulb was damaged, the dazzling light emitted proved that the battery had worked, that is, the modification was successful, but the bulb was unbearable.

In order to thoroughly understand the secret of this "coal block", Li Shan invested in it, and he purchased a laser pointer with a large power from the Internet.

In order to test his idea, he purchased the laser pointer that can be fitted with a No. 5 battery.

He loaded the modified battery into the laser pointer, held it in his hand and pointed it at the white wall, and pressed the switch very casually.

Listening to a slight "chirp", a red dot was reflected on the wall in front of him, and the light spot of this red dot was two or three millimeters in diameter, and the spot was small but very dazzling.

Li Shan pressed the switch a few more times, but there was no response.

"The battery is dead?" Li Shan was a little disappointed in his heart, this is too useless.

He glanced at the wall and saw a black dot on the white wall, which looked like someone had randomly clicked on it with a pencil.

In Li Shan's impression, before pressing the switch, he remembered that he glanced at the wall, and there didn't seem to be this black spot, could it be that he remembered it wrong?

This black dot is the spot where the "flashlight" has just shown its spot. With some doubts in his heart, Li Shan approached the black spot and took a closer look, and found that this black spot was not dotted on it with a pen, it turned out to be a small hole.

"What is this?" Li Shan was even more puzzled in his heart, he touched the hole with his hand, and felt a bumpy feeling. Looking at this small hole, the opposite side is my own kitchen, and there is no light through, it should not be penetrated.

He found a needle that his mother used to sew clothes, and reached in to try it.

The small hole is just the size of the needle to fit in, but you can't feel the depth, because the needle is fully inserted, but it doesn't have the same shape as it ends.

"How did this come about......?" Li Shan looked at the laser pointer in his hand and subconsciously pressed the switch.

There was another "chirp", and a spot of light instantly appeared on the wall, and it disappeared quickly, but Li Shan clearly saw that there was an extra black spot where the spot disappeared.

Li Shan immediately approached the wall and found that the black spot was indeed a small hole, and he carefully observed the new small hole.

This small hole is basically the same size as the one just now. When the small holes were formed for the first time, Li Shan was not sure, then the second time he saw the whole process of the formation of the small holes very clearly, that is to say, the formation of these small holes was caused by this so-called laser pointer.

How powerful is this laser?!

This made Li Shan a little unbelievable, if he hadn't seen it with his own eyes, who would have believed that this small laser pointer would be able to make such a hole in the wall.

Although the wall in front of it is not a load-bearing wall, it is nearly 20 centimeters thick, and it is all made of cement and red bricks, which still has a certain strength.

However, the laser pointer in front of you can easily pierce a hole in it, and its energy is so strong that you can imagine.

"What would happen if this were to shoot on a person's body?" Li Shan couldn't help but think of this, which made him a little shocked.

This laser pointer is so small, easy to carry, and the sound when it is fired is so small that it is almost negligible, it is much stronger than the silent pistol seen in the movie, and for guns, this management is quite strict in Huaxia, and it is very difficult for ordinary people to get guns. And this laser pointer, no, it should be said that the appearance of the laser is equivalent to God giving himself a big killer!

With this big killing weapon, Li Shan didn't know if it would be a blessing or a curse for him.

"How much energy can be stored in such a small battery?" He carefully looked at the laser in his hand, it was originally an ordinary tool that could be purchased casually from the Internet for entertainment, teaching, etc., but after changing to a battery, it itself has undergone a qualitative change.