Samsung Galaxy Note 9 battery life test results are out

Samsung Galaxy Note 9 battery life test results are out
One of the best new features of the Samsung Galaxy Note 9 is not a feature at all: it's just a much larger battery with a capacity of a whopping 4,000mAh, enough to last you the day and the night (and likely even more if you don't use your phone too much).

In our short real-life journey with the Note 9, we did indeed find that its battery lasted more than your average phone and Samsung delivers on the promise of an "all-day" battery.

But we wanted some more scientific data and that is why we ran our proprietary battery life test on the Note 9's 4,000mAh battery.

The results are now in and you can check them out and compare the Note 9 to other phones right below.

Battery life (hours) Higher is better
Samsung Galaxy Note 9 8h 56 min (Excellent)
Samsung Galaxy Note 8 7h 50 min (Good)
Samsung Galaxy S9+ 8h 5 min (Excellent)
Apple iPhone X 8h 41 min (Excellent)
Apple iPhone 8 Plus 10h 35 min (Excellent)
Google Pixel 2 XL 8h 57 min (Excellent)
OnePlus 6 8h 10 min (Excellent)
LG G7 ThinQ 6h 32 min (Average)

So, what is immediately obvious is that the Note 9 is a marked improvement from last year's Note 8. The Note 8 had a 3,300mAh battery, while the Note 9 has 4,000mAh cell, some 20% larger. Running the same battery test on these two phones, the Note 9 gets a 14% better score at nearly 9 hours, which is an excellent showing.

You can also see that the Note 9 outperforms most other modern flagships by a good margin.

Charging speeds


Another important aspect of the battery life equation is the time it takes to recharge your phone when your battery is dead or running low.

And with a bigger battery, it might take longer to recharge the Note 9.

Thankfully, the time to charge it up is still pretty fast: it took us 1 hour and 49 minutes to fully charge up the Note 9 from a completely dead battery to the full 100%. We have used the provided in the box Samsung fast wall charger with the provided USB-C cable.

Right below, you can also see how these charging rates compare to charging speeds on other 2018 flagships.

Charging time (minutes) Lower is better
Samsung Galaxy Note 9 109
Samsung Galaxy Note 8 102
Samsung Galaxy S9+ 105
Apple iPhone X 189
Apple iPhone 8 Plus 178
Google Pixel 2 XL 152
OnePlus 6 80
LG G7 ThinQ 107

Would you buy the Note 9 just for its battery life? And do you think that it is a worthy upgrade over its predecessor? Let us know in the comments right below!

Related phones

Galaxy Note 9
  • Display 6.4" 1440 x 2960 pixels
  • Camera 12 MP / 8 MP front
  • Processor Qualcomm Snapdragon 845, Octa-core, 2800 MHz
  • Storage 512 GB + microSDXC
  • Battery 4000 mAh(29h 3G talk time)

FEATURED VIDEO

79 Comments

1. scarface21173

Posts: 655; Member since: Aug 17, 2014

2. MrSolo

Posts: 3; Member since: Aug 03, 2018

I was just about to post that haha.

5. Well-Manicured-Man

Posts: 670; Member since: Jun 16, 2015

These videos aren’t any proof. You don’t know how healthy the battery in the respective phones was. for example, iPhone X is almost one year old. It is very likely that the phone’s battery is not at its full capacity anymore. Anyway, i am sure Note 9 deserves the win but i am not sure whether by this margin.

8. maherk

Posts: 6767; Member since: Feb 10, 2012

You should watch the video, as this was addressed and the reviewer mentions that these are review phones and not his daily drivers, meaning that their batteries are fairly new.

20. Well-Manicured-Man

Posts: 670; Member since: Jun 16, 2015

I wateched the video before commenting in the first place. I am not a native English speaker. I must have missed it. Anyway, I stick to my comment overall. These videos don’t mean much. Why? Because you can find so many videos which all yield different results even though the same devices are compared. This leads me to the conclusion that authors have too many options to bias the results in favor of a device they may want to win.

47. ShadowSnypa786

Posts: 553; Member since: Jan 06, 2017

Nope he says all phones are done within 50 charge cycles. Remember the Note 9 and S9 are still outputting in 1440p. Dropping resolution down to 1080p in settings doesnt change the fact its still pushing out all the same pixels as a 1440p device.

59. deleon629

Posts: 449; Member since: Oct 04, 2014

Exactly. I stopped watching those "vs." videos because of this. One YouTuber had deleted my comment posted after (respectfully) questioning why he never used/compared new conditioned older flagship devices to make performance and battery tests video comparisons with today's 'latest and greatest' on the market.

41. Anujg

Posts: 2; Member since: Dec 18, 2017

Moto z play :D

42. rantao333

Posts: 345; Member since: May 21, 2013

its time for that comment iphone X has HIGHER RESOLUTION!

48. ShadowSnypa786

Posts: 553; Member since: Jan 06, 2017

Nope lower resolution and smaller display. 1440p vs 1125p 6.4 inch vs 5.8

3. GreenMan

Posts: 2697; Member since: Nov 09, 2015

So... It barely managed to beat The iPhone X; despite having an enormous battery and is still nowhere near close to The iPhone 8 Plus which, BTW, has a 1,500mAh smaller cell? Rather fascinating, eh? Oh well, G'Day!

17. toosmoove

Posts: 914; Member since: Sep 28, 2017

"Rather fascinating, eh?" You mean rather untrue. I have 3 coworkers rocking an 8 Plus & 1 with an X that I see using their chargers by midday, meanwhile my Note 8 is at 30% when I get home at 7 PM (after having been off the charger for 13 hours).

26. AfterShock

Posts: 4146; Member since: Nov 02, 2012

Same here, iPhone using Co workers are on the cable by afternoon coffee. It's a joke as these folks are working somewhat too, not just sitting playing on phone.

46. apple-rulz

Posts: 2002; Member since: Dec 27, 2016

"Rather fascinating, eh?" You mean rather untrue. I have 3 coworkers rocking an Note 8 & 1 with an 9+ that I see using their chargers by midday, meanwhile my iPhone 8 Plus is at 30% when I get home at 7 PM (after having been off the charger for 13 hours).

51. toosmoove

Posts: 914; Member since: Sep 28, 2017

Imitation is the sincerest form of flattery. Also, it's a feminine character trait. Says a lot about you.

53. apple-rulz

Posts: 2002; Member since: Dec 27, 2016

Imitation is the sincerest form of flattery. Also, it's a feminine character trait. Says a lot about you.

58. GreenMan

Posts: 2697; Member since: Nov 09, 2015

I said it in a sarcastic way, mate. I too don't believe the test result! Wanted to write 'peculiar' but instead wrote 'fascinating'! I've my share of doubts about a 5.5" IPS device with a minuscule 2,500mAh battery lasting as much as PhoneArena claims! I'm not accusing anyone for misrepresenting certain brands. I just find it hard to believe on a personal level. G'Day!

62. toosmoove

Posts: 914; Member since: Sep 28, 2017

My response was in agreement with yours.

65. strategic_developer

Posts: 1627; Member since: Jul 17, 2018

PA claims a scientific tests is better than a test where we can watch the reviewer open apps an use them like many would. Like watch YT videos for an our, web browse for an hour. maybe watch a full length movie for 2hrs, play games for an hour. Every test I have seen like this, shows all iPhone's since the iPhone 6, last no longer than 6-6.5 hours. Even sites like GSMArena, have not gotten more than 7 hours. When I had the iPhone 7+, it never lasted more than 6 hours, unless I didn't use it much. Web browsing on the iPhone has shown it to lose nearly 50% of its charge in less than 2hours.

28. AfterShock

Posts: 4146; Member since: Nov 02, 2012

Just doesn't add up does it, like the test is skewered from the beginning. We all know it's borked when mostly every other tech site shows different. Wait,.... You believe this!! Made my day lol.

33. bucknassty

Posts: 1325; Member since: Mar 24, 2017

that iphone 8+ time is just a pure lie... they must have forgot they left it on the charger for the first 4 hours

49. ShadowSnypa786

Posts: 553; Member since: Jan 06, 2017

It has a 0.6 larger display and its still pushing out 1440p display. Iphone x display is smaller and doesnt push out as many pixels.

4. surethom

Posts: 1661; Member since: Mar 04, 2009

All day battery life LOL, ive not had an android phone last all day or even more than 9 hours in over 6 years. With moderate use never lasts.

18. toosmoove

Posts: 914; Member since: Sep 28, 2017

Depends on which one you're using.

6. cmdacos

Posts: 4082; Member since: Nov 01, 2016

Lmao. I expected far lower than the note 8 with PAs measurements of battery life. Will wait for real tech reviewers to review battery life and judge off of real usage.

9. Ellio74

Posts: 74; Member since: Mar 22, 2018

Better than the older one, that's it. For a 4000 mAh battery I expected more.

50. ShadowSnypa786

Posts: 553; Member since: Jan 06, 2017

Look how much a p20 pro gets will a smaller and less resolution display even huawei mate 10 pro

67. strategic_developer

Posts: 1627; Member since: Jul 17, 2018

The resolution doesn't play a huge lose in battery-life. And the Galaxy Note 8 and 9 by default have their displays set at FHD+, not QHD+. But you have to also consider the Note 9 is powering more storage, more RAM, a more powerful and higher clocked CPU and GPU, a slightly larger display, charging the S-Pen, the camera app is always running for quick-launch, and Android and TouchWiz background processes an more. Based on how much I expect a phone like this to drain a battery, I am estimating it should get 9.5hrs with medium usage and with heavy usage, PA's numbers could be correct.

10. Furkan

Posts: 552; Member since: Feb 25, 2017

V30 > 3300 mah 9h 34m charging time 108 Note9 > 4000 mah 8h 56m charging time 109

11. youssef44

Posts: 547; Member since: Apr 29, 2014

Battery lifetime is important but it isn't everything! Note9 hasn't impressive or new features like fingerprint scanner under display or 4K display

* Some comments have been hidden, because they don't meet the discussions rules.

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