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Home / Technology / The Galaxy S9 battery life is not as good as we had hoped

The Galaxy S9 battery life is not as good as we had hoped



I had great hopes for
Galaxy S9
s and
Galaxy S9 Plus
battery life when Samsung announced the two phones in late February.

Despite the fact that the Galaxy S9 and S9 Plus have the same battery capacity as last year
Galaxy S8
and S8 Plus ̵

1; it is 3,000mAh and 3,500mAh respectively – I expected them to exceed 2017 phones in battery life. Or at least undoubtedly meet the same standard.

The main reason for the expectation is Qualcomm Snapdragon 845 processor that lives in the Galaxy S9 and S9 Plus phones in the US and other countries. Samsung supplies the Galaxy phones in some regions with its home-made Exynos chip, but it's Snapdragon 845 that we tested the most.

  samsung galaxy s9-2400-6154

Galaxy S9 and S9 Plus have the same battery size as last year's models.


Josh Miller / CNET

Qualcomm promised that the Snapdragon 845 chipset would deliver 30 percent greater energy efficiency than the 2017 Snapdragon 835 chipset, which ran the Galaxy S8 and S8 Plus. The specified battery savings mean that the Galaxy S9 and larger S9 Plus would run longer on a single charger than the two S8 phones that use the Snapdragon 835 chip.

Instead, the Galaxy S9 battery preceded than the Galaxy S8 phones in our looping video battery drainage test. The Galaxy S9 Plus went better and released the Galaxy S8 Plus in battery terms, but only with a 4 percent margin. And even that gain is far less than the optimal battery savings proposed by the Snapdragon 845 chip. (See details below.)

  screens-s9-0317

Balancing long battery life with powerful features is a difficult business.


Josh Miller / CNET

Granted, our Video Laboratory Test is a highly specific performance indicator; It does not paint the full picture of phone usage, such as uploading websites and downloading photos, streaming video, and navigation on Google Maps. And it does not guard against telephone companies that "optimize" their software for this type of assessment. But our test provides a baseline useful for comparison, one that goes beyond random observation.

On the other hand, pure observation showed that both Galaxy S9 and S9 Plus phones drained much slower than the Galaxy S8 and Galaxy S8 Plus when I did not actively use them (that's good). Again I break all this down, so hold on.

I've watched battery operation since I started using the Galaxy S9 Plus almost exclusively in March. And while the phone will last me from morning to night on a single charge, I'm disappointed that either the Galaxy S9 Plus does not benefit from the Snapdragon 845s promised battery lift, or that the chip may only be theoretically more effective.

The party to "blame" is difficult to analyze since software and hardware work together to handle the phone's battery resources.

Read on laboratory test results, idle solutions and what you can do to manage a Galaxy S9 phone's battery life.

Galaxy S9 and S9 Plus Laboratory Test Results

We add three different Galaxy S9 devices (one with the Exynos processor) and four Galaxy S9 Plus phones through our video launch test. Some of these phones were borrowed from us by Samsung, someone we bought. The results were all over the map, which frustrated us incredibly, so we ran the tests over and over again.

The figures below represent the average of the Galaxy Battery Sewage Test Results – minus the Exynos Unit – compared to our average results from multiple Galaxy S8 and S8 Plus devices. Note that the Galaxy S8 and S9 phones have the same display size: 5.8 inches for the smaller devices and 6.2 inches for the Plus versions. The comparable screen size means no phone draws more power to light up a larger screen than the generation before.

The chart also shows how many hours of battery life we ​​expect to compare to the Galaxy S8 points, assuming we saw a 30 percent increase in energy efficiency from the Snapdragon 845 processor (it's a theoretical number, world results are often lower).

Galaxy S9 Battery Test Results (Snapdragon 845 chipset)

Battery Capacity CNET Video Flip Test Average * Battery Life from 2017 Galaxy S8 / Plus (+ 30%) Tested percentage change from 2017 Galaxy S8 / Plus
Galaxy S9 3000mAh 15 hours, 30 minutes (15.5 hours) 20 hours, 9 minutes (20.15 hours) -3.1%
Galaxy S8 3000mAh 16 hours N / A N / A
Galaxy S9 Plus 3,500mAh 18 hours 23 hours, 24 minutes (23.4 hours) 4%
Galaxy S8 Plus 3,500mAh 17 hours, 18 minutes (17.3 hours) N / A N / A

* Looping video in flight mode, screen brightness and headphone volume set to 50 percent (default resolution)

Finally, you'll see the battery's gains and losses from our tests compared to last year's Galaxy S8 results. The Galaxy S9 died faster than last year's Galaxy S8 (a change of -3.1 percent) and the Galaxy S9 Plus gave 4 percent better battery life over the Galaxy S8 Plus; an improvement, but not the knockout we had hoped for.

  samsung galaxy s9 plus unboxing 21

Andrew Hoyle / CNET

We've also played battery testers on a Galaxy S9 using Samsung's Exynos 9810 chipset, for an average of 15 hours, 20 minutes driving time on a single charge.

This result means : The Galaxy S9 and S9 Plus will give you the same battery life as last year's Galaxy S8 and S8 Plus when you actively use them.

The Galaxy S9 battery has a better idle resolution than Galaxy S8

  Samsung Galaxy S9-2400-6192

Galaxy S9 left and S8 share the same screen size and battery capacity.


Josh Miller / CNET

If the battery is not active charging, it is discharged. All phones will lose battery capacity even when you do not "use" them. It is called idle resolution – the phones still run apps and processes, check messages, pinging for data and so on.

To test on the Galaxy S9 drains faster or slower than the Galaxy S8, I both charged the phones, turned the brightness to 50 percent, turned on flight mode, and pulled them off at the same time. Then I kept track of their percentage during next week.

The Galaxy S9 drains significantly slower than the Galaxy S8 over time. After 72 hours, the Galaxy S9 had lost 50 percent of battery life, while the Galaxy S8 had lost 59 percent.

Seven days after the test started, the Galaxy S8 battery reserves its last, while the year's S9 still has 25 percent to go.

What this result means : The one variant I could not figure out is how fresh the S8 battery is. Batteries lose capacity as they grow older and the Galaxy S8 had more hours of use over its life than the Galaxy S9 when I started this test, even though this device was only used for the past year.

  Samsung Galaxy S9 and S9 Plus

Sarah Tew / CNET

Although the run-off test is not scientifically bulletproof, the large percentage gap indicates that the Galaxy S9 has a longer latency than the Galaxy S8.

Using Real Batteries

The Galaxy S9 Plus lends the phone that I've used almost every day, keeping me reliable from noon. 06:00 to 22.30, even when there are nights when the battery saves less than 10 percent when I go to bed. Other days of easy use, I can beat the hen by 20 or 30 percent again.

When I'm home, I'm pleased to let the battery levels close to the edge. A fee is only a few meters away. But when I'm out, a steady slide in the single digits is too risky. I feel compelled to fill up the S9 Plus when I know I'm going out.

As with any phone, map navigation, uploads, downloads, and video and audio streams can quickly suck up battery life. But even after my morning routine to check in to social media and read the news, I notice that the battery often fell to 80 percent within 2 hours, and often to 70 percent range 3 hours after awakening.

The Galaxy S9 Plus has never died on me before noon. 10.30, but it has been close.

What this result means : Do not trust the Galaxy S9 to take you from the morning to the long hours. As with most phones, if you are watching late night, take a charger or battery pack with you or prepare to turn on power save mode after hours.

How to make your Galaxy S9 battery longer (without installing other applications)

No phone is immune to battery operation, and the more you use it (especially streaming media and map navigation), the faster power goes dry. The Galaxy S9 and S9 Plus have some built-in battery settings to keep your phone longer life.

  • Turn off Wi-Fi and Bluetooth when you're not using them.
  • Turn on Wi-Fi power save mode, which will reduce battery usage when you're not active on Wi-Fi.
  • Turn on two levels of power save mode. This will reduce the brightness, limit the CPU speed (the phone will work a bit slower), disable the Always-On screen and may release the screen resolution.
  • Select programs that do not power when you do not use the activity

  • Watch this:

    Galaxy S9 for the most part aces our real movie.
  • Select programs that will never run in the background.

  http://www.cnet.com/


Play Now:
World Tests


5:03

Hopes longer battery life is on the horizon

Samsung knows that battery life is a flash point for buyers, and it's already promising long for its coming Galaxy Note 9 . Phonemaker dreamed the entire battery life in a video that was released before the 9th of August unpacked event. It is clear that extended battery life is in Samsung's way, and we hope that the company can win the 2018s note 9 and 2019s Galaxy S10 .

This story was published July 28 at 4:00 PT and last updated July 30 at. 20.20 PT.

Read Now : Galaxy S9's Six Best Features

Read Next : 5 Worst Things About the Galaxy S9


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