情報來源：
https://9to5mac.com/2019/08/07/iphone-battery-service-message/
Apple discouraging aftermarket iPhone battery swaps with new ‘Service’
message in iOS
蘋果藉由警告訊息來嚇阻私下換電池
Apple is taking new measures within iOS to prevent aftermarket battery swaps
for the iPhone. As detailed by iFixit, Apple has activated a “dormant
software lock” in iOS that blocks features like Battery Health in Settings
when an iPhone uses a battery that was not installed by Apple itself.
蘋果已經啟動了一個軟體鎖，當你的手機電池不是由蘋果安裝時，會看不到電池健康度
Essentially, if your iPhone needs a new battery and you take it upon yourself
to replace the battery, the Settings app will display a “Service” message
that reads as follows:
除此之外，你打開設定的時候會看到以下訊息
Important Battery Message
Unable to verify this iPhone has a genuine Apple battery. Health information
not available for this battery.
無法驗證這是真的蘋果電池，所以無法顯示健康資訊
Notably, this message will appear whether you install an aftermarket battery
or an official battery from Apple. The only scenario in which it doesn’t
appear is when Apple itself or an Apple authorized service provider does the
battery swap.
就算你是裝真的原廠電池，還是會看到同樣的警告畫面。只有蘋果或是其授權商換的
電池才不會有這個警告。
All of this stems from a Texas Instruments microcontroller on the battery
itself, which includes an authentication feature that includes details for
pairing the battery to the iPhone’s logic board. If the authentication key
provided by the battery doesn’t match what your iPhone is expecting, you’ll
get the “Service” warning. Apple and its partners are the only ones who can
clear this “Service” message.
這來自於電池本身微控制器的授權，假如iphone偵測到不同的授權，就會給你警告
Put simply, Apple is locking batteries to their iPhones at the factory, so
whenever you replace the battery yourself—even if you’re using a genuine
Apple battery from another iPhone—it will still give you the “Service”
message.
The only way around this is—you guessed it—paying Apple money to replace
your iPhone battery for you. Presumably, their secretive diagnostic software
can flip the magic bit that resets this “Service” indicator. But Apple
refuses to make this software available to anyone but themselves and Apple
Authorized Service Providers.
相對而言，蘋果和其授權商可以用軟體把"服務"的這個指標重設，所以不會顯示"服務"
訊息
簡單的說：我要賺錢～
不過中國的授權商不會把這個軟體流出嗎？