I really love using my 12.9"九游会手机版 Pro in my office. 我用它来查看和编辑文档,进行法律研究并管理电子邮件-有时与我桌上的计算机有关,有时而不是使用计算机。 较大的九游会手机版 Pro中的电池可以使用很长时间,但是有时整个早上用完后一直到下午才用完,所以我发现电池电量开始有点低了。 对于以前版本的九游会手机版,这不是问题,因为我桌上的Lightning电缆插入了桌子旁边的USB电源适配器,因此我可以插入九游会手机版并继续使用它,以恢复电源。我正在使用九游会手机版。 For the 12.9"九游会手机版 Pro, however, that isn't a great solution because the 12W USB Power Adapter that 苹果 includes with the 12.9"九游会手机版 Pro just barely puts out enough power to keep a 12.9"九游会手机版 Pro going, unless the screen brightness is turned down. 因此,如果您在17%时插入电源并继续使用九游会手机版 Pro,您所获得的收益不会超过17%。 上周,苹果推出了针对此问题的解决方案: Apple的USB-C转Lightning电缆,可与Apple的USB-C电源适配器配合使用。
九游会手机版的电源历史记录
When 苹果 first released the 九游会手机版 in 2010, it included a 10 watt (10W) power adapter 随着 a USB to 30-pin cable. In October of 2012, 苹果 introduced the 九游会手机版 4 和 九游会手机版 mini, the first 九游会手机版s to use a Lightning connector instead of the old 30-pin connector, 和 苹果 included a USB to Lightning cable 和 a new 12W USB power adapter — a slight increase to keep up with the additional power needs of newer 九游会手机版s. Since that time, 苹果 has included 10W or 12W USB power adapter with every 九游会手机版.
The 12.9"九游会手机版 Pro introduced in September of 2015 was the first 九游会手机版 to support a feature called fast charging, the ability to charge more quickly by using a power adapter with more oomph than 12W. It is still the only 九游会手机版 to support this feature; even the 9.7"九游会手机版 Pro introduced last week doesn't support fast charging. But for 12.9"九游会手机版 Pro users, the fast charging feature was inaccessible because there wasn't yet a way to get more than 12W of power to the 12.9"九游会手机版 Pro. 当然,苹果出售了一个输出功率为29W的USB-C电源适配器,但只能通过USB-C至USB-C电缆与Apple的MacBook笔记本电脑(具有USB-C端口)一起使用。
Last week, 苹果 announced its new USB-C至雷电电缆, a way to use that 29W USB-C电源适配器 with a 12.9"九游会手机版 Pro. 苹果 currently sells two versions of the cable: 25美元的1米版本和35美元的2米版本。 I bought the 2 meter version from 苹果, 和 I also purchased one of the 苹果 USB-C电源适配器s that have been 暂时在亚马逊上可用 售价49美元。 (Although I paid $49 on Amazon last week, I see that they are currently selling for $58 on Amazon; I presume that the price will soon return to $49, or you can just buy it for $49 from 苹果.)
USB-C电源适配器
29W USB-C电源适配器是方形的,就像12W USB电源适配器一样,但是略大一些—每侧大约2 1/8“,而不是每侧大约1 3/4”。 厚度保持不变,约为一英寸。
就像旧的电源适配器一样,新电源适配器上的插脚会缩回,从而更易于携带而不会刮伤任何东西。
当然,主要区别在于对USB-C而不是USB的支持。 我从来没有考虑过USB是一个大连接器,但是与USB-C所需的微小插槽相比,它是巨大的。
USB-C至雷电电缆
新的USB-C到Lightning电缆的一端具有我们自2012年以来一直使用的Lightning连接器,另一端具有USB-C连接器。 苹果's proprietary Lightning connector is a little bit smaller than the non-proprietary USB-C connector, but the size is similar.
Like the Lightning connector (and unlike traditional USB), you can plug a USB-C connector in either way, which is big improvement over 正常 USB.
性能
The reason that many 12.9"九游会手机版 Pro users will want to use the USB-C电源适配器 随着 the USB-C至雷电电缆 is performance. 29W的功率有很大的不同。
As I noted above, with the 12W adapter, 和 with my screen brightness at 100% or something close to that, I barely noticed any charging at all while I was using my 12.9"九游会手机版 Pro. 因此,增加电池电量百分比的唯一方法是(1)稍微降低亮度,如果您在充电时仍在使用九游会手机版,这仍然只能稍微增加电量,或者(2)完全关闭屏幕,然后等待将近五个小时才能从0%变为100%。 This was one of my biggest gripes with the 12.9"九游会手机版 Pro. If I used my 12.9"九游会手机版 Pro for much of the day on Monday 和 forgot to recharge it overnight, it was almost impossible for me to increase the battery percentage on Tuesday while I was also using the 九游会手机版 Pro.
使用29W USB-C电源适配器和USB-C避雷线,我不再遇到这个问题。 I can use my 12.9"九游会手机版 Pro with the brightness is at 100% 和 I'll still see about a 2-3% battery increase about every five minutes that it is plugged in. This means that in about an hour, I can get about an extra 25% or so of power added to my 12.9"九游会手机版 Pro, even if I have been using the 九游会手机版 Pro during that entire hour. 然后,我可以拿起我的九游会手机版 Pro在合作伙伴的办公室或会议室上班,并有足够的额外电量来工作几个小时。
Federico Viticci在MacStories进行的一项测试证实了我看到的性能提升, 本报告中所述 对于任何考虑购买这些产品的人来说,这都是必读的。 Using special software that measures 九游会手机版 charging, Viticci found that a 12'9"九游会手机版 Pro that is in use with 100% brightness takes over 12 hours to go from 0 to 80% with the 12W charger, but only 107 minutes with the 29W charger. 在屏幕关闭的情况下,从0到80%的充电时间从使用12W充电器的大约3.5小时变为使用29W充电器的大约1.5小时。
Viticci also found that, at 100% brightness, the 12W charger charged the 12.9"九游会手机版 Pro by 1.1% every 10 minutes, but that was when the 九游会手机版 was just on the 首页 Screen. 如上所述,如果在插入12 W充电器时实际上正在使用九游会手机版 Pro进行操作,则电池完全没有增加。 他还发现主屏幕每10分钟增加7.5%。 在我实际上使用九游会手机版 Pro进行测试的测试中,例如在GoodReader中读取PDF文档,我发现每10分钟增加4到6%。
其他设备
By the way, you can use 苹果’s USB-C电源适配器 和 USB-C至雷电电缆 to charge other devices, such as an iPhone. 他们的充电速度不会比使用旧版12W充电器快,但可以充电。 So if you purchase this as a solution for your 12.9"九游会手机版 Pro, you will also be able to charge your other devices with Lightning connectors.
结论
如果屏幕关闭,则29W充电器很不错。 You can charge your 12.9"九游会手机版 Pro more than twice as fast, useful if you are charging your 九游会手机版 Pro while you are at lunch. 但是,真正实现性能提升的地方是同时充电和使用九游会手机版 Pro。
If you own the 12.9"九游会手机版 Pro, should you spend $49 on the USB-C电源适配器 plus another $25 or $35 for the cable, depending upon the length? 我认为答案取决于您目前如何为九游会手机版 Pro充电。 如果您的解决方案是每天晚上充电,并且对您有用,那么您实际上就不需要担心需要充电五个小时还是三个小时。 反正你在睡觉 但是,如果您想在白天充电,Apple的USB-C电源适配器和USB-C至闪电电缆是非常有用的二人组,对我来说绝对值$ 85。 Hopefully, in the future, 苹果 will include these products in the box with the 12.9"九游会手机版 Pro.
点击这里 for 苹果’s 29W USB-C电源适配器 from Amazon (49美元或更多?)
点击这里 for 苹果’s 29W USB-C电源适配器 from 苹果 ($49)