The harm caused by poor cell phone charger

We charge the phone almost every day, but do you know that this little action hides great danger? The news that the phone exploded when it was charged or that caused the fire has already seen a lot of people, but at the most is to see It’s dangerous to marvel at the time, but few people worry about whether they will encounter such a thing, what caused the charger to explode or catch fire, what kind of charger is a qualified product.

Mobile Phone Charger
Today we have come to share this issue with all of us who use mobile phones.

Why does the charger explode or catch fire?

Before we talk about this topic, we first look at two typical news.

The Peninsula Metropolitan Daily reported that Mr. Wang who lives on the West Coast spent 10 yuan in a dozen square meters of communication stores to buy a charger without any logo. After he returned to the company, his mobile phone was almost out of power, so he used this charger. Charging the phone, I didn’t expect to hear a bang when I just plugged in. The cord and plug were burned to a darker tone. The impact of the explosion caused the charging cord to fling him on his face, and in addition, it caused The entire building was cut off.

The Guangzhou Daily reported that a dormitory fire broke out in a girls’ dormitory at Heping Middle School in Heyuan and burned many double beds. It was initially determined that the fire was caused by a short circuit in the unplugged mobile phone charger, which caused the bedding to ignite. Fortunately, there were no casualties.

Cell Phone Charger
From the news, you should probably have learned about one or two reasons. There are mainly three reasons for the explosion or fire of mobile phone chargers.

1, purchase inferior products

Many roadside stalls, or street-side shops, sell chargers that cost less than 10 yuan. When used, they can normally charge, but they don’t have any logos. Even the most basic brand names are not available. However, many people have bad chargers, or want to have one more charger in the office. Because they are cheap, they all choose to purchase the charger.

You know that buying a charger that doesn’t have any product information is simply buying a time bomb. In order to save the finished product, these chargers have very simple internal circuits and do not have any protection mechanism. When the charging voltage is not stable, the components inside are easily short-circuited by current breakdown, and accidentally explode because there is no short-circuit protection. .

If you are buying a charger that does not have any product information, you can take a closer look at the splash screen, jump screen, leakage, or slowing down of the phone when charging. For your own safety, we recommend not to use it again. Now.

Phone Charger
2, long-term charger
Many people have such bad habits. The charger is always plugged into the socket. When charging is needed, the USB port is plugged in. After the battery is charged, the phone is unplugged and the charger is never removed from the socket. Pull it down.

The charger is plugged into the socket for a long time. Although there is no cell phone connected, there will still be current flow through it. Long-term access to the charger’s circuit board will not only cause the charger to age, but also cause short circuits. It will also cause fires, explosions, and even accidental electric shocks. Therefore, after the mobile phone is fully charged, the charger should be unplugged or the outlet power turned off. This is something we can avoid artificially.

3, the charger aging
Although it is a regular original charger, but after a certain number of years, the internal components are aging, not only the charging speed becomes slow, but also the risk of explosion when the voltage is unstable, so the charger is best for about two years Change again.

Best Phone Charger
Of course, in addition to this, the explosion or fire of the charger may also be related to the charging environment. For example, charging in an environment with excessive temperature may easily cause explosion of the charger and the mobile phone. However, whether it is caused by long-term chargers, or caused by the aging of the charger, or is caused by the charging environment, these human factors we can all pay attention to in daily life, can change the bad habits of using the charger.

But for the charger is not bad, how do we determine it? A qualified charger is a certain standard, the charger will have a 3C logo, this logo indicates that the charger meets the country in terms of safety and compatibility Mandatory standards require quality assurance. But really good charging products, in addition to 3C certification, should also have protection features to avoid overload caused by accidents.

Wholesale Cell Mobile Cellular Phone Charger
For example, taking our selling dual-port USB plug, it has the following protection features:

1, overvoltage protection

The maximum output voltage of an ordinary mobile phone charger is generally 5V, and we all know that the domestic AC voltage is a standard of 220V, and the mobile phone charger will convert the AC voltage to a low voltage and then transfer it to the mobile phone as a transformer. With overvoltage protection charger, when the voltage is unstable and the output voltage is higher than 5V, the charger will directly stop charging the mobile phone. When the output voltage recovers to the normal range, it will automatically turn on, which can avoid load or instantaneous High voltage damages the cell phone battery.

2, over-current protection

Over-current protection is when the current exceeds a certain limit, the charger will automatically disconnect the circuit, so that the charger and the mobile phone are protected without being burned by a large current.

At present, the real charge current of the mobile phone is generally between 1A and 2A. When does the over-current protection usually start? If the phone charger you purchase has an output of 5V2A, then the overcurrent protection of the charger is 1.2-1.5 times more than the output current (that is, 2A). When the output current exceeds 2.4A-3A, the protection mode starts, and when the current is stable, it will automatically resume charging.

3, short circuit protection

There are many mobile phones on the market that actually only have overvoltage and overcurrent protection, but they do not have short-circuit protection, and high-quality chargers will have short-circuit protection.

Under normal circumstances, what happens to a short circuit? For example, if you charge the phone on a table, if you accidentally knock over the cup, the output voltage of the charger will directly connect to the USB case due to the infiltration of water when the water seeps into the charger. Causes a short circuit. At this time, if there is a short-circuit protection device, the charger will quickly react in the moment of short circuit, that is, a few subtle time, and immediately cut off the power supply, which can prevent the charger and the mobile phone from being burned or caught fire.

Of course, in addition to entering the water, a playful child inserts metals such as small wires into the charger’s jacks, which may also cause short circuits, so short-circuit protection is crucial.

4, over temperature protection

There is a certain requirement for the temperature environment when the mobile phone is charged, and this is easily overlooked. During the hot summer days, the temperature of the sun is very high outdoors, and some tourists have no electricity on their mobile phones. They use the charging treasure to charge directly, and they also play the mobile phone under the sun while charging. Actually, such behavior is very dangerous. A slight carelessness may occur. Caused the phone to explode.

Of course, in addition to the external temperature environment, if the charger is overloaded for a long time, making the component temperature too high will shorten the life of the charger. Chargers with over-temperature protection function, when the charger chip temperature reaches 85 °C or so, will stop charging, enter the protection mode, so as to avoid the explosion of the charger and mobile phones and other dangers.

5. Use fireproof materials

The charger can explode and cause a fire. Most of the time, it is caused by sparks igniting the charger case during the explosion. High quality chargers will use ABS+PC professional fireproof materials to completely eliminate the possibility of fire caused by the charger itself.

At present, the original chargers of major brands of mobile phones basically have the above protection functions, but after the original charger is broken or lost, it is not cheap to buy one again. So many people will choose to go to a small shop to buy a charger at random, in fact, that is unwise choice.

Many dual USB interface charging heads are usually 1A or 2A current sharing when charging multiple devices. For example, when two flat panels are charged at the same time, the actual current is only 1A, and the charging speed will be slowed down. In order to do a lot of work on these details, the dual-port USB charger has a total output of 3.4A. Even if the phone or tablet is charged together, it will not affect the charging speed.

Our Mobile Cell Cellular Phone Charger