If Apple’s iOS is purposefully slowing down your phone, a battery upgrade may help. But don’t make that expensive step without checking for forced ‘performance management’ first.

如果Apple的iOS故意降低了手机的速度，则电池升级可能会有所帮助。 但是，如果没有先检查强制的“绩效管理”，就不要迈出昂贵的一步。

By Eric Griffith

由 埃里克·格里菲斯

It wasn’t that long ago—December 2017—that Apple admitted it was indeed slowing down iPhones over time on purpose. Ostensibly, this was to make sure you didn’t want to throw your phone against a wall after an OS upgrade because the batteries inside were becoming a real drag on performance and sometimes causing unexpected shutdowns. Apple throttled the battery output to the CPU down on older iPhones so the battery would last a little longer and shutdowns would cease.

不久之前(即2017年12月)，苹果公司承认其确实在故意放慢iPhone的速度。 表面上，这是为了确保您不想在操作系统升级后将手机摔在墙上，因为内部电池已成为性能的真正障碍，有时会导致意外关机。 苹果降低了旧款iPhone上向CPU输出的电池电量，因此电池使用时间会更长一点，并且停止关机。

The slowdown in performance was discovered when replacing a battery put older iPhones back to full performance. Which would have been a good thing, if the general public had been told about it upfront.

发现性能下降是在更换电池使旧版iPhone恢复到完整性能时发现的。 如果预先告知公众，这将是一件好事。

In response to that kerfuffle, Apple offered $29 replacement batteries for select older iPhone models through 2018. But Apple did not stop throttling older iPhones. The difference is, it’ll actually tell you about it now. And by tell, I mean, you can go looking for the info in your iPhone’s battery settings.

为了应对这种混乱局面 ，苹果在2018年前为部分型号的旧iPhone提供了29美元的更换电池。但是，苹果并没有停止节制旧版iPhone。 所不同的是，它现在实际上会告诉您。 通过说，我的意思是，您可以在iPhone的电池设置中查找信息。

Is your iPhone’s battery capacity bad enough that it needs a replacement? That can be a scary process for your expensive life-line to all connectivity, especially if you’re quarantined at home. And it isn’t cheap. It costs $49 for iPhones from models 6 up to 8, as well as the old and new SE versions, or $69 for the X, XS, XS Max, XR and all iPhone 11 models, if you go through Apple.

您的iPhone的电池电量是否足够严重，需要更换？ 对于昂贵的所有连接生命线来说，这可能是一个令人恐惧的过程，尤其是如果您在家中被隔离。 而且它并不便宜。 对于价格从6到8的iPhone，以及旧的和新的SE版本，它的价格为49美元，对于X，XS，XS Max，XR和所有iPhone 11型号，如果您使用Apple ，价格为69美元。

It could mean relinquishing your iPhone for days. Apple Stores could do it during a lunch hour, but who knows when they’ll fully reopen? Same likely goes for any third-party fix-it shop; if you do go to one, make sure they wash their hands. Or do it yourself- iFixit sells iPhone Battery Kits, including tools for $29.99 for iPhone 8/8 Plus, with more expensive options for the X, XR, and XS Max ($44.99) and XS ($84.99).

这可能意味着放弃您的iPhone数天。 苹果商店可以在午餐时间做到这一点，但是谁知道他们什么时候可以完全重新营业呢？ 任何第三方修理厂都可能遇到同样的情况； 如果您确实要去，请确保他们洗手。 还是自己动手做-iFixit出售iPhone电池套件 ，包括价格为29.99美元的iPhone 8/8 Plus工具，以及价格更高的X，XR和XS Max(44.99美元)和XS(84.99美元)选项。

Before you decide, make sure to dig into the data about your iPhone’s battery to determine if the replacement is even warranted. Rest assured, if you hang onto your iPhone long enough, it will be warranted eventually.

在做出决定之前，请确保深入了解有关iPhone电池的数据，以确定是否需要更换电池。 请放心，如果您在iPhone上挂的时间足够长，则最终将获得保证。

提防“绩效管理” (Beware of ‘Performance Management’)

In iOS 11.3, released in March 2018, Apple added Battery Health in order to save face amidst legal battles related to BatteryGate. (Eventually, Apple agreed to pay everyone affected by it $25 each, part of a class-action lawsuit; total cost to Apple in the end will be between $310-$500 million.)

在2018年3月发布的iOS 11.3中，苹果添加了Battery Health，以在与BatteryGate有关的法律斗争中挽回面子。 (最终， 苹果公司同意向受其影响的所有人每人支付 25美元，这是集体诉讼的一部分；最终， 苹果公司的总成本将在310至5亿美元之间。)

The Battery Health option exists to provide the smallest modicum of transparency about the capacity of an iPhone’s battery, and if iOS is crippling iPhone performance. Supposedly, iOS will only throttle the power to the CPU if your battery is below 100 percent capacity and it has one unexpected shutdown.

电池运行状况选项可提供有关iPhone电池容量的最小透明度，以及iOS是否会削弱iPhone性能。 据说，如果您的电池电量不足100％并且意外关闭，iOS只会节流CPU的电源。

In iOS 11.3 or later go to Settings > Battery. At the bottom, Apple now includes lovely bar graphs showing your iPhone battery-charge levels and screen activity over the last 24 hours or 10 days.

在iOS 11.3或更高版本中，转到设置>电池 。 苹果现在在底部包括漂亮的条形图，显示您过去24小时或10天内iPhone的电池电量和屏幕活动。

You can also see the full battery usage per app. That’s a nice way to determine if some app is in the background sucking up all the juice, but mostly it’s about activity time. (You can toggle back and forth between Activity and Battery Usage.)

您还可以查看每个应用的完整电池使用情况。 这是确定某个应用程序是否在后台吸取所有能量的好方法，但主要是与活动时间有关。 (您可以在“ 活动”和“ 电池使用量”之间来回切换。)

Above those, tap Battery Health. This is the area of importance. Next to Maximum Capacity is a percentage of how much your battery can currently hold in comparison to when it was brand new. The lower it is, the worse things are for all the lithium-ion inside holding the power.

在这些上方，点击电池运行状况。 这是重要的领域。 “ 最大容量”旁边是与新电池相比当前可以容纳多少电量的百分比。 值越低，内部所有保持能量的锂离子的情况就越糟。

Peak Performance Capability is the one to watch. It might say “Your battery is currently supporting normal peak performance.” That means it is, as Data used to say on Star Trek, functioning within normal parameters.

峰值性能能力是值得关注的。 可能会说：“您的电池当前正在支持正常的峰值性能。” 就像Data在Star Trek上所说的那样，这意味着它在正常参数范围内起作用。

However, it might say “This iPhone has experienced an unexpected shutdown because the battery was unable to deliver the necessary peak power. Performance management has been applied to help prevent this from happening again.”

但是，它可能会说“此iPhone意外关机，因为电池无法提供必要的峰值功率。 应用了绩效管理来帮助防止这种情况再次发生。”

That last bit is a flowery way of saying “we throttled the power to your CPU for your own good.” Thankfully, the option should be right there for you to disable performance management.

最后一点是一种华丽的表达方式：“为了您自己的利益，我们限制了CPU的电源。” 值得庆幸的是，该选项应该就在那里，以禁用性能管理。

Be aware that if the phone has another unexpected shutdown that iOS blames on the weak battery getting sucked hard by the CPU, it’ll apply performance management throttling all over again.

请注意，如果手机又因iOS导致电池意外掉电而归咎于电池电量不足，这会导致CPU严重受累，那么它将再次应用性能管理进行节流。

You may also see a message that says your iPhone battery’s health can’t be determined, or that it is so sufficiently degraded that now is the time for you to replace it. That generally won’t happen until the maximum capacity is lower than 80 percent after 500 complete charge cycles (read more about that in our story about battery myths).

您可能还会看到一条消息，提示您无法确定iPhone电池的健康状况，或者电池已严重退化，现在是您更换电池的时候了。 通常在500个完整的充电周期后最大容量低于80％时才会发生这种情况( 有关电池神话的更多信息，请参见我们的故事 )。

With the iOS 11.3 update, Apple locked apps out of looking at the battery capacity or charge cycle number. Way to keep it transparent, Cupertino. However, for more details on what’s happening inside the iPhone, download an app like Lirum Device Info Lite. It doesn’t look at battery info, but does chart the ups and downs of your iPhone chip’s performance under This Device > CPU > CPU Actual Clock (versus the CPU Maximum Clock; you want to see the same number for both). You’ll be able to see performance changes in real time.

在iOS 11.3更新中，Apple锁定了应用程序，而不再关注电池容量或充电周期数。 库比蒂诺，保持透明的方式。 但是，有关iPhone内发生的情况的更多详细信息，请下载Lirum Device Info Lite之类的应用。 它不会查看电池信息，但会在“ 此设备”>“ CPU”>“ CPU实际时钟”下 (而不是“ CPU最大时钟”下 ，您希望看到相同的数字)绘制iPhone芯片性能的起伏。 您将能够实时查看性能变化。

If you want to do any of this on your iPad or even the iPod touch-you can’t. Battery Health is only available on iPhones, because Apple isn’t throttling iPads and the iPod touch. However, the charts displaying charge levels and screen activity are available.

如果您想在iPad或iPod touch上执行任何上述操作，则不能。 Battery Health仅在iPhone上可用，因为Apple不会限制iPad和iPod touch。 但是，可以显示显示电量和屏幕活动的图表。

If you’re interested in counting exactly how many charge cycles your iPhone (or iPad or iPod touch) have been through, that’s not easy to find but there are desktop apps that can help. CoconutBattery 3 for macOS or the $35 iBackupBot for Windows can pull data from an iDevice connected to a PC and display the “cycle count” number, among other data. At anything over 500 charges, your iPhone battery has seen better days; for iPad the number is more like 1,000 cycles (it has a bigger battery).

如果您想精确计算iPhone(或iPad或iPod touch)经过的充电周期，这并不容易找到，但是有些台式机应用程序可以提供帮助。 适用于macOS的CoconutBattery 3或适用于Windows的售价35美元的iBackupBot可以从连接至PC的iDevice提取数据，并显示“周期数”编号以及其他数据。 充电超过500次，iPhone电池的使用情况就会更好。 对于iPad，该数字更像是1,000次循环(它有一个更大的电池)。

决定升级 (Decide to Upgrade)

So what’s the criteria for getting a new battery? Certainly, consider it if you see the performance management kick in too often or the Lirum Device Info app displays a significant downgrade in the CPU Actual Clock number. Definitely upgrade if the iPhone’s own Peak Performance Capability says your battery health is “significantly degraded.”

那么获得新电池的标准是什么？ 当然，如果您发现性能管理启动太频繁，或者Lirum Device Info应用程序显示CPU实际时钟号明显降级，请考虑一下。 如果iPhone自身的“峰值性能能力”表明您的电池运行状况“显着下降”，则绝对可以升级。

If you’re brave and/or cheap, get the iFixit battery replacement kit option. Otherwise, you may have to live with the problem until the 2020 quarantine comes to end, or until you mail-order your next complete iPhone upgrade.

如果您勇敢和/或便宜，请获取iFixit电池更换套件选件。 否则，您可能不得不忍受这个问题，直到2020年检疫结束，或者直到您邮购下一次完整的iPhone升级为止。

Originally published at https://www.pcmag.com.

最初发布在 https://www.pcmag.com 。