Man sees what happens if you ignore the four most important lithium battery safety warnings to test how dangerous it is

Lithium batteries are everywhere, quietly powering phones, laptops, tools, and cars.

They also come with a short list of safety warnings most people barely register.

One creator decided to stop taking those warnings at face value.

So he ignored all four to see what would happen.

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The four lithium battery safety warnings everyone ignores

At a glance, lithium batteries look harmless. 

Inside, though, each cell is a tightly rolled stack of materials: a positive electrode, a negative electrode, and a plastic separator so thin it’s doing all the heavy lifting. 

As long as that separator keeps the layers apart, everything behaves. 

Once it fails, though, things escalate fast.

That’s why the same four warnings show up again and again.

Don’t get them wet. 

Don’t expose them to heat or fire. 

Don’t crush, puncture, or take them apart. 

And never short-circuit the terminals.

They sound obvious, but they all exist for the same reason. 

Every rule is about preventing one thing: an internal short circuit. 

That single failure is what turns a boring metal cylinder into something extremely dangerous.

What happened when this man ignored all four safety warnings

To show why those rules exist, Erik from YouTube’s Concept Crafted Creations ran four controlled experiments, each designed to break one safety warning at a time.

Test one: Water

The first test looked almost boring.

Dropped into plain tap water, the lithium battery did nothing. 

That’s because fresh water isn’t very good at carrying electricity.

Then salt was added.

Suddenly the water could conduct electricity, giving the battery a path to leak energy into its surroundings. 

It wasn’t explosive, but it was unstable – a slow, messy discharge that becomes dangerous once moisture starts creeping inside the cell.

Test two: Heat and fire

Next came heat.

The battery was warmed evenly with a gas burner, and pressure began building up inside the metal casing. 

A safety vent popped first, releasing gas exactly like it’s designed to do.

But the heat didn’t stop.

The chemistry inside the battery broke down, thermal runaway kicked in, and the battery started producing its own heat and oxygen. 

From that point on, it didn’t need the burner anymore – the reaction was feeding itself.

Test three: Puncture damage

This one escalated instantly.

A steel drill punched straight through the casing, forcing the internal layers to touch.

There was no buildup and no warning. 

It ignited on the spot.

The drill bit itself ended up glowing red – not from drilling friction, but from the energy dumping out of the battery.

Test four: Short circuit

The final test looked calm by comparison.

Thick copper wires short-circuited a single battery, pulling a huge amount of current and heating it up fast.

Then it leveled out. 

No fire and no explosion.

But that calm only applies to one cell.

In real battery packs, cells sit tightly together and heat each other up. 

One failure quickly turns into many, and the reaction spreads fast.

By the end, the pattern was obvious.

Water, heat, punctures, and short circuits might look like different mistakes, but they all cause the same problem.

Once a lithium battery’s insides fail, the reaction keeps going on its own.

And at that point, the battery doesn’t need fire – it makes its own.

To see the test in full, subscribe to Concept Crafted Creations on YouTube.

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