情报来源：
https://9to5mac.com/2019/08/07/iphone-battery-service-message/
Apple discouraging aftermarket iPhone battery swaps with new ‘Service’
message in iOS
苹果借由警告讯息来吓阻私下换电池
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.
苹果已经启动了一个软件锁，当你的手机电池不是由苹果安装时，会看不到电池健康度
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，你打开设定的时候会看到以下讯息
Important Battery Message
Unable to verify this iPhone has a genuine Apple battery. Health information
not available for this battery.
无法验证这是真的苹果电池，所以无法显示健康资讯
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.
就算你是装真的原厂电池，还是会看到同样的警告画面。只有苹果或是其授权商换的
电池才不会有这个警告。
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.
这来自于电池本身微控制器的授权，假如iphone侦测到不同的授权，就会给你警告
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.
相对而言，苹果和其授权商可以用软件把"服务"的这个指标重设，所以不会显示"服务"
讯息
简单的说：我要赚钱～
不过中国的授权商不会把这个软件流出吗？