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Samsung Galaxy S9 and S9+ battery test results are out

Samsung Galaxy S9 and S9+ battery test results are out
Our in-depth Samsung Galaxy S9 and S9+ review is out and the verdict is in: the S9 series are great phones, but they are all about minor improvements over the S8 rather than any radical changes.

Out of all the new features, though, we wanted to take a separate look at one key element of the S9 experience: battery life. Is it any better than on the Galaxy S8 or Note 8 series? And how does it compare to other flagship phones in 2018?

We've been using the two new Galaxy S9s for more than a week now and our real-life impressions about battery life are that you still need to go to the charger every night. Yes, the S9 will last a long day on a single charge, but they will not last a full two days for those who use their phones a lot.

Battery life test results


In order to confirm these impressions, we also ran out proprietary battery test on the new S9 family. For this test, we set all phones at the same brightness level to equal the playing field. Here are the results that we got:

Battery life (hours) Higher is better
Samsung Galaxy S9 7h 23 min (Average)
Samsung Galaxy S8 8h 22 min (Average)
Samsung Galaxy S9+ 8h 5 min (Average)
Samsung Galaxy S8+ 8h (Average)
Samsung Galaxy Note8 7h 50 min (Average)
Apple iPhone X 8h 41 min (Good)
Apple iPhone 8 Plus 10h 35 min (Excellent)
Apple iPhone 8 8h 37 min (Good)
LG V30 9h 34 min (Good)
Google Pixel 2 8h 40 min (Good)
Google Pixel 2 XL 8h 57 min (Good)
OnePlus 5T 8h 51 min (Good)
Huawei Mate 10 Pro 12h 5 min (Excellent)

As you can see, there is actually a decline in the battery score when you compare the S9 series to the S8. We can attribute this to the more powerful chip on the S9 series that draws more power, but relies on the same 10nm manufacturing technology. For all else, the Galaxy S9 has a 3,000mAh battery, same as on the S8, and the S9+ has a 3,500mAh cell, the same capacity as on the S8+. Samsung's official battery numbers speak of an unchanged battery performance, in case you were curious.

But how does the S9 series compare to the other top-tier phones? Not all that great actually. Its score was actually the lowest of them all, and often by a big margin, so keep that in mind when you consider buying the newest Galaxy.

Time to recharge


There is one other important aspect of the battery experience and that is charging times. The new S9 and S9+ both support Samsung’s Fast Adaptive Charge and come with a fast charger in the box. Last year’s models also supported the same functionality.

We also tested the time it took for the phones to get from 0 to 100% charge using the charger in the box, and we found no change. Both the S9 series and the S8 series top up in around 1 hour and 40 minutes, give or take a few minutes.

Charging time (minutes) Lower is better
Samsung Galaxy S9 107
Samsung Galaxy S8 100
Samsung Galaxy S9+ 105
Samsung Galaxy S8+ 99
Samsung Galaxy Note8 102
Apple iPhone X 189
Apple iPhone 8 Plus 178
Apple iPhone 8 148
LG V30 108
Google Pixel 2 111
Google Pixel 2 XL 152
OnePlus 5T 93
Huawei Mate 10 Pro 102


Also, both the S9 and S8 series support wireless charging.


You don’t get a wireless charging pad in the box, but Samsung sells chargers separately, and they look awesome, support fast wireless charging, and allow you to have your phone in an upright position, so they double as a dock as well.

Related phones

Galaxy S9+
Galaxy S9

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