It is generally accepted that the fastest of all a smartphone is discharged by the switched on display, but even the screen time varies greatly depending on which Internet you use – mobile or Wi-Fi network.
I have long wanted to tell you about one interesting feature that I noticed when testing battery life. We have two traditional tests that I run on each device: watching HD video at maximum brightness and reading at 30% brightness. In both tests, I turn on the 'on the plane' mode, because the coverage of the operator, even in my house, often jumps, and if you leave the network on, then one smartphone will work for a long time, because it is well attached to 3G, and the second will constantly jump between 3G and 4G will eventually run out faster.
So, now I have a Mate 9 on my test Huawei, the smartphone shows excellent results in our tests (about 8-9 hours of video), but in everyday use it works for about three to four hours of an active screen. That being said, I don't even use the maximum brightness. For fun, I tried to use my smartphone all day at home and also on the road. I understand that I won't open America to anyone here, but when working on Wi-Fi, the device naturally discharged much more slowly. In this regard, I remembered the reviews of one Ukrainian reviewer, whose test devices lived one and a half to two hours longer, this was due to the fact that there is no 4G coverage in / in Ukraine that sucks the smartphone charge.
In Moscow, you are either already in the LTE zone, or the device is constantly jumping between 3G / 4G, which naturally does not contribute to the operating time. By the way, I remember when I traveled to other cities in Russia, I immediately noted the increased operating time of my smartphones. As a result, it turns out that the mobile Internet drains the battery no less efficiently than a switched on screen or running toys. However, in my opinion, this is a decent price to pay for such good speeds.