Mobile phone batteries are required for every mobile phone, but the imitation goods on the market are endless.
The length of battery standby time is an important indicator of the pros and cons of the battery. The length of battery standby time is determined by the balance of the unit rechargeable batteries that make up the battery. The actual battery standby time should be basically the same as that indicated on the manual. The fake is only half of the identification time. Some inferior batteries are assembled from used batteries and cores, plus new packaging. If the seller cannot guarantee that the standby time is the same as the instructions, you cannot purchase the battery. Some sellers have vowed, in fact, he does not know the actual capacity of the battery, just casually dictation. Such batteries are typically fabricated from poor quality battery cells. If you find that the standby time is short after purchase, you should request a refund immediately.
The capacity of a mobile phone battery is generally 1000 mAh/hour or 1000 mAh. Some fake batteries have no capacity identification at all, and there are signs and illegible characters. You can also take the battery to the mobile phone repair shop to measure the current to distinguish between true and false. Now everyone is using a lithium battery, and the lithium battery is composed of several batteries that are similar to the size of the 5th and 7th, and is equipped with a switching device and a protection circuit. So it has a certain weight. If the lithium battery you bought is too light, the battery capacity is insufficient and the battery may be defective. Generally, the weight of a 900mAh lithium battery cell is 35g. If the battery core of a battery plus other equipment and the battery case weigh less than 35g, the battery may be fake.
The mobile phone battery is a flammable and explosive material. If there is no protection circuit inside the battery, it is easily deformed, leaked, or even exploded. However, in order to attract consumers at low prices, many inferior batteries have removed this circuit protection board to make more profits. There are still many unsafe batteries on the market, and it is difficult to identify them from the outside. It is best to buy at a regular telecommunications mall when purchasing.
There are three main types of mobile phone batteries on the market: lithium ion batteries, nickel metal hydride batteries and nickel batteries. Because lithium-ion battery has the largest capacity, long standby time and light weight, it is the mainstream of mobile phone batteries. Therefore, all of the above are based on lithium batteries.
The common problem of counterfeit and shoddy batteries is that the core components in the battery have poor quality, insufficient charging capacity, short discharge time, poor anti-destructive performance, and the standard battery capacity does not match the actual. All of this leads to short standby and talk time of the mobile phone. When the battery is fully charged, it will be fully discharged, and some will automatically shut down.
At present, the market is full of fake and shoddy mobile phone batteries, which has damaged the interests of many consumers. Genuine mobile phone batteries generally have the following appearance characteristics: the battery label uses secondary printing technology. Under certain light, when viewed from the slope, the color of the barcode part is obviously darker than other parts, and it is touched by hand, which feels slightly smaller than other parts. Convex, many original batteries have this feature. The surface of the genuine battery label is lightly scratched with metal objects, and there are traces like pencils. The battery case is made of special materials, which is very strong and not easy to damage. Under normal circumstances, it is not easy to open the battery case. The battery has a neat appearance, no extra burrs, a certain roughness on the outer surface and a comfortable hand. The inner surface feels smooth and under the light. Can see fine vertical scratches.
The battery electrode and the mobile phone battery have the same width, and the corresponding position under the battery electrode is marked with a “+” and “-” mark. The insulation material between the battery charging electrode pieces is the same as the outer casing material, but not integral. When the battery is installed in the phone, feel comfortable and comfortable. The battery lock is partially and securely pressed. The battery label is clearly written and has a battery part number corresponding to the battery type. The manufacturer on the battery should have a clear outline, and the anti-counterfeiting mark has good brightness and looks three-dimensional.
Usually, lithium-ion batteries are lighter in weight, and each battery is about 100 grams. Considering this obvious feature, you can’t fake it at random. You can use the method of measuring the weight of the mobile phone battery to identify whether the battery belongs to the hanging sheep. The type of dog meat sold, after all, other types of batteries, compared with lithium-ion batteries, the weight difference is relatively large, simply called a weight, if the battery is too heavy or too far from the 100-gram standard, it can be roughly inferred This battery is a counterfeit product.
The advantage of this method is that it is intuitive to identify and easy to operate. The disadvantage is that the identification range is limited, and it is only effective for identifying lithium ion batteries, and it is not convenient to implement.
The “watching and seeing” here actually refers to carefully observing the appearance color of the mobile phone battery, whether it is consistent with the appearance color of the mobile phone. At present, many mobile phone manufacturers, in order to gain a foothold in the mixed market and protect their own interests, will often strive to improve the technological level of mobile phone batteries through continuous technological transformation, in order to ensure the suppression of fake batteries through high quality quality. Battery sales. Under normal circumstances, the appearance color of the original mobile phone is exactly the same as the appearance color of the mobile phone battery. Therefore, we can install the battery that has just been selected on the mobile phone to see if the colors are the same between them. If there is a significant difference in the color and color between them, the battery is likely to be a counterfeit product.
There are some kinds of mobile phone batteries, we can completely identify the authenticity of the battery according to the method of combining the hardness of the point. Press firmly on the rounded joint of the phone battery and use your finger to directly feel the softness and hardness of the joint. Normally, the binding point of the genuine mobile phone battery is relatively softer, and it also shows a certain flexibility, especially when the battery is inserted into the mobile phone, there is a smooth and non-blocking feeling, and it is easy to insert, and it is suitable for the mobile phone. The harmony is stable with the lock; on the contrary, the texture of the inferior battery is relatively hard, and the battery is not easy to “slip” into the battery compartment of the mobile phone when it is installed.
The advantage of this method is that the operation is very simple. The disadvantage is that the accuracy of the identification is not high, and the scope of identification is limited.
Every piece of mobile phone battery with superior quality looks clean and clean, the texture is very clear, and the surface of the case is free of any scratches and damages. The label attached to the battery case should contain the type, model and capacity. , positive and negative signs, standard voltage, battery manufacturer name and other parameters. In addition, there should be no scratches on the metal contacts on the battery, and there should be no green or black mildew. If the mobile phone battery you selected is different from the genuine mobile phone battery described above, you can basically assume that the current purchased battery is a fake.
Some of these methods are stupid, but they are very practical. In general, it can be used to select batteries for most machine friends. I hope that you can buy cheap and high-quality products when you buy batteries for your love machine.
High parameter is not necessarily good.
The mobile phone can undoubtedly be regarded as the fastest growing product in the past two years, and with the collective progress of the screen, memory, camera, ring tones, etc., the overall level of the mobile phone has been raised to new times again and again. the height of. However, the advancement of technology is not necessarily known to everyone. Even the small editors who work as practitioners often have the feeling of “three days not seeing the same”, let alone those who are busy with their own work every day. Innocent consumers. It is precisely because of this, some black-hearted manufacturers can not help but start a trick, and began to deceive consumers through the technical point of view. This of course is our Zhongguancun online mobile channel can not see the past!
Screen parameters: 260,000 colors must be better than 65,536 colors?
Since the first 256-color color screen mobile phone was officially launched in China in 2001, we have experienced several dynasties such as 256, 4096, 65536 and 262144 color screens. Even a small number of products using 16777216 color screens exist in the market. Of course, we often see mobile phone manufacturers are happy to use this as a selling point to publicize. However, the screen of 260,000 colors must be better than 65,536 colors? Material color number is more important!
At present, the most common mobile phone screen materials are: TFT, TFD, STN, CSTN and UFB. With the birth of BenQ-Siemens S88 and Sharp V903SH in the parallel market, OLED and ASV are gradually becoming familiar. If the display effect is ranked from high to low, it is ASV, TFT, OLED, TFD, UFB, STN, CSTN. As the process matured, it also symbolized that high-end TFT screens have entered the mortal world, and most of the mid-end products use this material. In order to save costs, the mobile phone of about 1,000 yuan will be equipped with UFB, STN and so on. It can be said with certainty that the 260,000-color UFB display is inferior to the 65,536-color TFT, so users should never be superstitious.
The so-called resolution refers to the resolution of the picture, which consists of pixels. The higher the value, the finer the picture, the less graininess, and the more information that can be displayed. Most of the low-end mobile phones in the market currently use 128×128 and 128×160 resolutions, while the mainstream products are mainly 176×208 and 176×220, while the high-end is mainly occupied by QVGA (240×320). Some friends will complain that their mobile phones display blurred photos and subtleties are not clear, which are mainly caused by lower resolution. Just as our computer screen will have a new look after adjusting the resolution from 800×600 to 1024×768, we recommend that you try to choose a product with high resolution if economic conditions permit.
This is an important indicator that complements the screen color and resolution. It is usually based on the diagonal length in 吋 (inches). The larger the value, the larger the screen. In general, for screens of 2.0 inches or less, we don’t have to choose a product that is higher than 65,536 colors. Because research shows that the human eye is hard to feel the effect of color increase in this case. The screen above 2.0 inches, at least with a resolution of 176 × 208 (QVGA is better), so that the details of the image can be fully expressed, and then the effect of 260,000 or even 16 million colors, which is the best Combination method.
Memory capacity: How many word games can be returned?
No matter whether a mobile phone can support third-party memory cards, the memory capacity of the machine itself is a topic of concern to everyone. The bigger the natural, the higher the appeal. However, the real machine is often inconsistent with advertising. Faced with all kinds of “following words” from manufacturers, do you really have the ability to recognize?
Usually the unit we use to measure the phone’s memory space is MB, which is Mbyte. But now some mobile phone manufacturers are starting to introduce their products with Mbit. Why? Actually it is very simple, because 8bit=1Byte, so 8Mbit=1Mbyte. If a memory has only 5MB of products and you use Mbit as a unit, you can write it as 40Mbit. An unsuspecting consumer will naturally choose a product of a higher order of magnitude?
When the mobile phone is shipped from the factory, part of the content is solidified in the memory, and the user can call it and cannot delete it. Some vendors label the space occupied by the system with the sum of the memory actually opened up to the user in the advertising slogan, which is naturally much more than the products that only indicate the actual free memory. It is also worth noting that the memory of some products is not what the user wants to save. The manufacturer has fixed the space for pictures, videos, ring tones, etc. before leaving the factory, but it is not dynamically allocated, and it seems to shrink.
Photo effect: 4 million is not as good as 2 million?
The camera pixel, this is a topic that is increasingly valued by everyone after the mobile phone entered the megapixel level in 2004. However, what is the image quality of a camera phone, is it really only determined by the pixel level? Can you distinguish between “effective pixels” and “highest pixels”?
A high school classmate of Xiaobian recently purchased a LINUX smartphone with a 4 million-pixel camera that was just launched by a famous domestic mobile phone brand. However, after buying it, he found that the image quality is very general. At first I thought it was dust on the lens, but after a few wiping effects, it still didn’t improve. Later, I found out in the network that I found out that this is an effective pixel of only 1.3 million, but it is written by software and interpolated to achieve 4 million products, so its photo effect is actually less than 2 million pixels.
“Effective Pixels”, the English name for Effective Pixels, refers to the pixel values ​​that are actually involved in photographic imaging. The value of “highest pixel” (both nominally 4 million as previously mentioned) is the true pixel of the photoreceptor, which typically contains the non-imaged portion of the photosensor. When users buy a camera phone, they usually see that the merchant advertises “maximum pixels reach ***”, but avoids talking about the effective pixels. At this point, we must figure out what the effective pixels are, because this value is the key to determining the quality of the picture. Who should I choose for “AF” and “Face Focus”?
Although the megapixel camera is now the standard for many camera phones, it has become the mainstream of the market, but we must not simply regard their photo effects as the same horizontal line. With the decline of the Sony Ericsson K750c (data article price review), the “autofocus” phone is no longer a symbol of high-end. Our previous evaluations can prove that in the case of the same pixel, regardless of color performance, landscape level or macro, night scene shooting, etc., “autofocus” is much better than the ordinary “pan-focus” effect.
“AF” (AF, the abbreviation of English Auto Focus), also known as “Auto Focus”, is an electronic and mechanical device that automatically sets the focus on the subject and makes the image clear. Features. The most important feature of autofocus is high focusing accuracy and easy operation. Especially for focusing on the subject, autofocus has advantages, and it also helps the photographer to concentrate more on the captured picture. At present, mobile phones mostly use passive autofocus, which mainly performs autofocus by electronic visual or phase difference detection by receiving light from the subject.
Ringtone system: The higher the number of chords, the better the effect?
“Chord” is also called polyphony, polyphony, which refers to the sum of the pronunciations of each channel in MIDI. The polyphonic ringtones are richer than the previous monophonic sounds, and have a strong three-dimensional sense. Therefore, when the mobile phone used this technology, it immediately became popular. From 16 (previously there have been 4, 8, etc.) to the current top 128, the chord technology has grown very fast in the past two years. However, in the face of the rapid blush of real people singing MP3, AAC and WAV, the “chords” that can’t simulate vocals began to look faltering. Xiaobian here to advise consumers is that if you prefer to use MP3 ringtones, then you don’t have to care about the number of chords when you buy, because it has nothing to do with the MP3 ringtone effect, we have nothing to do with it. More attention should be paid to the quality of its speakers.
Standby time: Can you really not charge for a week?
We can often see 200 or even 300 hours in the standby time parameter of a certain model of a certain brand, but when we buy it, it is often found in the actual use process, the standby time of three days or even two days. Can’t reach it. So, is the manufacturer cheating us?
Under normal circumstances, after the manufacturer fully charges the mobile phone, the time that the battery can maintain between the consumption of the battery and the low battery warning is called “standby time” without being in a call, without shutting down, and without any operation. “, so we usually call it “theoretical standby time.” In actual life, the mobile phone not only has to shoulder calls, send and receive text messages, GPRS Internet access, play MP3 music, run JAVA games, etc. The battery also supplies power to the screen, keyboard lights, speakers and other modules, naturally it is impossible to reach the manufacturer test. The “ideal state”. Especially when the user is in a region where the network signal is not very good, the mobile phone will automatically increase the transmission power search signal to further accelerate the battery power consumption.
Smartphone: How much more do you not know?
I have been in the mobile phone industry for a short time, and there have been more than two years. Often “infested” in the counter of the retail store, let me talk about some of the JS situation when the terminal retail.
1. After getting the machine, the general customer will check the appearance of the machine and the box of the package immediately. Only the friend who knows the knowledge of the mobile phone will open the back cover of the machine to see if there is a “network access permit” to see the battery. Is there a contact? If a battery has a large contact, I suggest that you do not listen to the three-inch tongue of the mobile phone salesperson. This mobile phone is already the so-called second mobile phone.
2, the appearance, the battery is normal, then the average person will choose to boot. Experienced salespersons should find a corresponding brand of battery. That is, the cheap battery will give you a boot and try to protect the original power. After the machine is turned on, usually the machine that is turned on for the first time will enter the system very slowly. After entering the interface, enter *#06#, and the 15-digit string code displayed on the screen can be checked against the barcode on the side of the box. Is it exactly the same, the average machine should have three or four bar code stickers.
3, next to talk about the most critical, and is rarely easy to attract people’s attention – three guarantee card three insurance card generally fill in the complete information, but also stamped with the dealer’s seal such as “some Communication equipment cable company “” a certain mobile phone monopoly”, etc., these are required to provide to the customer service during maintenance, this time you pay attention to see, the warranty card generally has three links, many domestic is four, you need to put the barcode Paste it, return it to the manufacturer, one to the seller, one to the consumer, so the data returned to the manufacturer can be found in the customer service center, or it can be recorded in the seller. If your warranty card has only one link, only one page with the words “consumer retention” is printed, and nothing else. Then I can tell you lucky that your machine is a so-called “rework machine” or other customers return for some reason, JS will usually buy another warranty card, stamped with their own seal, because the manufacturer The company has returned to the factory and the sales have been reported. Therefore, this machine belongs to a sales machine, which is the “rework machine” mentioned in the circle. This detail has not been discovered yet. The retail counters in the mall will talk face-to-face with the salesperson. In many cases, they will buy a mobile phone in a confused way, and even have not yet recorded what model they have purchased.