Nokia E7 1 uses BP-4L battery, and the current market price is about 180 yuan. Fake? Batteries are much cheaper, some even cost more than ten dollars, but profiteers sell them at the original price. The high price of the original battery means huge profit space, so the profiteers came up with the idea of BP-4L high imitation battery.
"The first step is to look at the outer packaging printing.
The front of the battery (assuming the front)
"1. See? 4?
The oblique stroke of the high imitation battery number is very thin, and the oblique stroke of the original battery is the same as the horizontal stroke.
"2. Do you see it? k？
Nokia? Is the letter there? k？ On the packaging of the original battery, the vertical stroke and the flip stroke should be connected together; The two strokes of the high imitation battery are far apart, which is easy to distinguish.
"3. Do you see it? . ?
On the original battery 3.7V？ In the middle? . ? It should be a perfect circle, and the point of high imitation battery is square and rectangle.
"4. Do you see it? +?
Original battery? +? The size is bigger, and it feels almost full, but it is a high imitation of the battery? +? Smaller in size.
"The back of the battery.
Compared with the front, the back has more details and smaller fonts, but several differences are still obvious and easy to distinguish.
"1. Look at the overall printing.
Looking at the packaging and printing as a whole, the printing of the original battery is very clear, neither too thick nor too thin. High imitation batteries have rough printing, and some high imitation batteries? 3.7V？ There will even be two in the middle? . ? It is still an easy problem to find.
"2. Do you see it? Lithium ion?
There are two kinds of original batteries, lithium ion 00 and lithium ion. At present, imitation electricity is only lithium ion, and there is no 00 behind it.
"3. Do you see it? Trash can? model
You should be able to see the clear chute on the circle in the middle of the wheel with the trash can pattern on the original battery. Too thick and too thin means it is anti-electric. Some bionic wheels are partially hollow.
"4. Look at the QR code
High imitation battery QR code printing is dim and rough; The QR code of the original battery is stereoscopic and clear.
"The second step is to look at the shell.
When the battery is produced, it is a pity that there is a glue injection hole at the bottom. This hole is generally irregular, looks like a rubber texture and feels a little rough. The holes of the high imitation battery are completely decorative, so it is much neater, with bright surface and strong plastic feeling.
Finally, the primary battery is encapsulated by pouring glue from the upper two holes; The pores of high imitation batteries are much neater by comparison. Because this hole is used for injecting glue in the battery production process, it is inevitably a bit rough.
"The third step is to look at connections.
The contacts of the original battery and the high imitation battery are arranged neatly, which is not easy to see. However, the high imitation battery contact can't see the black prefix, but it can be seen on the original battery, which looks like several black spots.
In addition, observing the contact of batteries is also an important method to identify the authenticity of mobile phones. Generally, the production technology of high imitation batteries is relatively backward, and the materials and workmanship of contact pads are far less than those of original batteries. Imitation contacts are generally thin and elastic, which often leads to poor contact between batteries and mobile phones, leading to frequent crashes. This thin contact piece is easy to deform, and the deformed contact piece can be visually distinguished.
"The fourth step is to look at the laser sign.
The pattern of the original battery is very clear, while the pattern of the high imitation battery is a bit blurred. Laser Beacon Nokia has pictures on its website at /A44 17507. You can compare it.
You can combine the above identification methods to observe every detail and avoid buying fake batteries with high imitation.