iphone 7 plus battery life
In a first for iPhones, Apple says the iPhone 8 and 8 Plus can "fast charge" from 0 to 50 percent in 30 minutes. That is, as long as you have a specific kind of Apple power adapter (29-, 61-, or 87-watt) and a USB-C to Lightning charging cable — both of which are not included.

We ran our own tests to find out. A video posted to YouTube shows an iPhone 7 Plus charging nearly as fast as an iPhone 8 Plus using Apple's 29-watt power adapter and a USB-C cable. Even before we began testing, that didn't seem to make any sense. Fast charging requires special controllers inside of the device and power adapter to transfer more electrical power.

On Android phones, if you use a power adapter that's not certified for Qualcomm's Quick Charge technology, it won't charge up your device at the faster advertised speeds. So we got to work: Using Apple's advertised accessories (for our tests, a 29-watt power adapter), we fast charged up a new iPhone 8 Plus and year-old iPhone 7 Plus that's only been charged up every few weeks.

Generally speaking, both batteries are in great condition. In the YouTube video we saw, an iPhone 8 Plus charges up to 45 percent in 35 minutes and to 42 percent on the 7 Plus in the same amount of time. Though the YouTuber claims he used legitimate accessories, we got different results in our own tests.

In our tests, both phones were drained to 0 percent, and then were put in Airplane mode and brightness lowered to 50 percent after they automatically turned on. Per our data, the iPhone 7 Plus charged about one percent per minute, while the 8 Plus gained 1.8 percent per minute.