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Apple Watch Series 3 disassembly: battery capacity surprise

via:威锋网     time:2017/9/26 15:29:19     readed:1680

Wei Feng network news, apple recently in the conference officially launched the cellular data version of the Apple Series 3 Watch, Apple simply, Watch is now able to separate the phone, send text messages, then it inside what is the mystery? Next, let's follow iFixit's disassembly to get to know it.


The second generation supports Force Touch's OLED Retina screen

Like the original Apple Watch, Series 3 is also divided into two dimensions: 38mm (272 x 340 resolution, 290 PPI) and 42mm (312 x 390 resolution, 302 PPI)

Apple (Apple) custom S3 watch packaging system

Optional LTE and UMTS functions, built-in GPS/GLONASS, NFC, 2.4GHz, 802.11b/g/n, Wi-Fi and Bluetooth 4.2

Accelerometer, gyroscope, heart rate sensor, microphone, speaker, barometric altimeter, optical sensor

Waterproof level (50 meters deep)

WatchOS 4


Before you start, send the X light chart internally

This X ray diagram is provided by Creative Electron

Figure X light from a comparative point of view, the overall layout and the original Watch did not change too much but the speaker seems to be some new below welding (X light upper right corner of the map)


Take a look at the back first and make sure the new watch is broken


Yes, this is the Apple Watch Series 3, the top product in the Apple Watch series (which is the LTE version)

In this most secretive location, the watch is A1889



It looks like the overall layout hasn't changed much, and hopefully the old dismantling method will work

Go: heating, slide, but don't be influenced by that little red

If you don't look at the little red dots, you think they're pretty similar in dismantling Series 2


The cables have been removed. Let's take a look at this screen

Overall, this screen is not very different from Series 2, but one difference is that there is a multi frequency antenna (for LTE)

Compatibility tests will be done later to see if the two generation screen is generic

This screen is now less than the previous generation and a IC chip, the chip may be less important

Red: Analog Devices 343S00092 touch control chip

Orange: NXP semiconductors 80V18 NFC module

Yellow: empty solder area (previous 20211CP TD1628A chip)?


As with previous versions, you need to disassemble a Y screw to go deeper

Watch 1/3 position is occupied by the Taptic Engine, but also hidden a label below support, including looking for battery interface

Then take the battery off and let's go on to see what's hidden in this watch. (professional engineers can wear it in hand and disassemble it, but please don't try it, everybody.)


Although iPhone's battery capacity is shrinking, the capacity of Apple Watch batteries has increased

The battery type of Series 3 is A1848, and the 1.07Wh power is encapsulated (3.82V 279mAh)

Comparison of 10.3Wh and Series 2 increased by nearly 4%, with the first generation of Watch 0.78Wh increased by 32%

It is worth mentioning that, while increasing the battery capacity, apple can also maintain the antenna, radio, power amplifier and SIM card space, these things are all loaded into the same size as in the fuselage


So far, so good, continue to take out the sensor / pad that supports the Forch Touch function, with the Analog Devices AD7149 capacitive sensing control chip we have seen on Series 2


Continue dismantling parts, then spun off Taptic Engine, and had no difference between this version

Then we take out the antenna array, including what we think is the GPS antenna


With further disassembly, speakers with active drainage are removed, which can be waterproof when you dive underwater


With 2 Series contrast, we got something new and useful new RF RF chip, which should be used to deal with the function of LTE and another change, the exhaust hole in the side of the microphone with a look like the air pressure sensor module

It's a bit confusing for apple to say a new barometric altimeter when it released Series 3 at the Jobs theater. We saw a barometer last year

It's time to pull out the motherboard



Red: STMicroelectronics ST33G1M2 32 bit microcontroller with ARM SecurCore microprocessor SC300 (this should be embedded SIM Apple Watch card)

Orange: Avago AFEM-8057 Wi-Fi front-end Wi-Fi module?

Yellow: SkyWorks 78109-12

Green: FY, LEE, C7P, light blue: FF1A02

Dark blue: apples? 339M00035


The last step: backplane. It is like pushing pressure in the Teflon materials of the ring but only need to use the thumb can be taken by the

This material has been standardized production on the Watch, and now it is adding ceramic, replaced the previous Ion-X and sapphire material

It also includes the photoelectric blood volume volume scanner (PPG) for detecting heart rate

This is for the previous generation product detection accuracy, Tucao upgrade

The wireless charging coil seems to have been modified to support most of the Qi standard wireless charging devices. Finally, the new barometer takes the position next to the microphone, so where is the air vent? The answer is: next to the diagnostic interface


That's all the dismantling

Finally, thank you for your help from Circuitwise

And thanks to Creative Electron for X - ray photos


The repairable score is 6 points (10 points for easiest repair)

The strap can be replaced easily, easily and quickly

Screen change is difficult, but it doesn't mean you can't change it. The screen is the first to be disassembled during the disassembly process and connected by a zero insertion force connector

Battery replacement is tricky

Although not unique, the Y screw is an obstacle to maintenance

The cable for any component maintenance needs to be welded

The encapsulated S3 system makes motherboard level maintenance difficult

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