A question about the charger, a question about the charger

There is an impact, because the capacity of MP4 batteries is very small, 500 mAh is much larger than 300 mAh, nearly twice as much, if you charge a 300 mAh battery with a 500 mAh charger, the battery will be charged, and sometimes it may be charged, the original charger It is designed for batteries, but don't worry, just use the charger you bought, and unplug the charger in time when you see it full. Estimate that your 500 mAh charger will charge a lot faster than your original charger ! Fast charging is not as good as slow charging!

There is no effect at all, the output voltage is the same, the load is the same, and the operating current is the same.

300, 500mA is the maximum allowable working current, is an upper limit, your MP4 with 300mA is no problem, with 500mA is even more fine.

The voltage has no effect The current refers to the maximum current According to Ohm's law, the same voltage is only related to the resistance of the load, that is to say, the charger with the same voltage The larger current is better.

kinguan's makes a lot of sense!

According to Ohm's law, the voltage is the same, and the current is only related to the resistance of the load

So don't worry! It works!

However, the quality of the charger must be guaranteed, that is, the voltage value of the label must match the actual output!

Probably not. is the output voltage.

500mA is the rated current.

The so-called linear technology is relative to digital switch technology. In the early days of the electronics industry, before the development of digital technology, all the changes in the characteristics of electrical appliances can be marked by curves, which is linear technology

nology）。The new electronic digital technology (digital technology) is a series of signals on and off, focusing on software applications, which is non-linear.

Conventional linear transformers are made of silicon steel sheets and many enamelled copper wires. Because of the direct conversion of power voltage, the working frequency is 50 hertz of mains. The lower the operating frequency, the greater the transformer inductance.

Therefore, the silicon steel transformer needs to be wound with a lot of enameled copper wire, which is not only large in size, large in weight, but also low in work efficiency.

The new type of switching power supply, because the power is converted to high-frequency operation, so the transformer inductance used is much less, the volume and weight of the whole transformer become smaller, and the work efficiency is also improved.

The slender wire in the transformer is the enameled copper wire, which is wound around the magnetic core (such as silicon steel sheet) to generate inductance. Two sets of enameled copper wires wound on the same magnetic core will induce voltage to each other, and the winding voltage with more turns will be larger. This is the basic principle of transformers.

A charger made of traditional linear transformers is a linear charger! Fewer parts are used. The new type of switching power supply transformer uses a large number of parts, including many resistive elements to control current and voltage. Resistive components are arguably the most basic components in electronics.

Do you understand about the same? Linear chargers are the internal step-down of the charger that uses a transformer -- the kind that is wound with copper wire. --Basically, it is not used much, and the disadvantage is that the heat is not good, and the loss is large.

I don't know why it's called linear.

There's also a kind of charger that we're using now -- switching power supplies.

At present, the mobile phone on the market uses a lithium battery, and the battery has been activated when it leaves the factory, and the lithium battery has no memory, so it can be charged at any time. When the battery is fully charged, it can be powered off (after the first three full charges, it can be charged for another 1-2 hours).

Here are a few tips for charging your phone:

1.Do not over-discharge. When the device prompts that the battery is low, it should be charged; Charging is not until the device is automatically turned off, and the battery has been over-discharged. This can affect battery life. So when the phone prompts that the battery is low, it can be charged.

2.Do not overcharge. When the charger gives a full charge, it should be unplugged.

Now the charger generally has a full self-stop design, it doesn't hurt to take off the battery from the charger for a short time, but leave the battery on the charger for a long time, and the grid voltage rises in the middle of the night, and the charger that has stopped charging will continue to charge after the voltage rises, causing the battery to overcharge. This can affect battery life.

3.If the battery is not used for a long time, it should be charged to 60%, stored separately in a cool and dry place, and recharged every other month.

4.It is recommended not to use the mobile phone when charging, and it is on standby for charging.

It's no problem to use! It also supports Xiaomi's Quick Charge technology (9V fast charging)!

Today's smartphone batteries are non-removable, and in addition to using the charger to convert AC 220V to DC 5V, 9V or 12V when charging the mobile phone, it also integrates secondary step-down and charging control circuits in the mobile phone. to ensure that the battery is charged safely!

Xiaomi Mi 4S Important Parameters.

Main screen size: 5 inches.

Main screen resolution: 1920x1080 pixels.

Rear camera: 13 million pixels.

Front camera: 5 million pixels.

Battery capacity: 3260mAh

Battery type: Non-removable battery.

Yes, not very good, the voltage is a bit high.

The phone cannot be charged using a power bank, it is recommended that you:

1.Use the original charger to connect to the home power supply to charge, if the charging is normal, the phone is fine.

2.Replace the charging attempt with another power bank. It may also be an incompatibility issue, not all power banks can support this model.

3. The charger insurance is burned.

4. The power cord is unplugged from the battery socket due to poor contact and other reasons. The flashing of the charger indicator does not charge the battery properly, so the charger or battery must be checked and replaced.

Slow charging is better for the battery, reducing heat, the only inconvenience is that the charging time is long.

Ordinary ones can be used for flash charging, don't worry, there is no problem, remember that the flash charge of other mobile phones should not be used indiscriminately.

It is still recommended that you buy an original charger that matches your mobile phone to use.

At present, there will be no such statement, the technology has long solved the problem of overburst charging, and it is generally full of self-protection.

If it cannot be charged, the voltage and current will damage the mobile phone.

If your phone won't charge, we recommend you try it as follows:

1.Use the original charger to connect to the home power source for charging.

2.Replace the power outlet, try or change a data cable to connect to the charger for charging.

3.If the phone can be turned on normally, it is recommended to back up the data in the phone (such as contacts, multiple files, etc.) and restore the phone to factory settings.

If the problem persists according to the above methods, please bring the purchase invoice, warranty card and machine to the nearest service center for inspection.

3 All hello, thanks for using Samsung products!

Based on your description, it is recommended that you plug and unplug the charger again; And check whether the charging port is caused by poor contact; If you have a spare charger, use a different charger to connect, and if this problem persists, please send your phone to your local Samsung service center for testing.

Unplug the mobile phone battery first, and then install it, some mobile phone batteries have low voltage protection, and see if there is a problem with the interface, you plug in the punch head, move the plug, and see if there is a state of charging, if there is, it may be that there is a problem with the charge port and the punch wire, and then find a punch wire to try, if it doesn't work, either there is a problem with the charge port or there is a problem with the charge management chip.