LG G4 battery life test: nothing's changed since the G3

The LG G4 is the most impressive flagship that the company has whipped up to date, with a bunch of "firsts" under its belt, like a tri-axis image stabilizer, color spectrum sensor, and a stitched genuine leather exterior option.

We took it for a spin over the weekend, and just released our review of the new LG flagship, basically determining that it lives up to the claims in the press release, and then some. It shoots some of the best photos you can obtain from a mobile phone (including in low-light conditions), offers a bright and ultra high-res display, and has a removable battery plus a microSD slot - a combo that no other flagship this year can claim.

There is the inevitable weak spot, though, which, just as with its predecessor, appears to be the battery life. The LG G4 lasted a tad north of six hours of screen-on time in our standardized battery benchmark test, which falls a bit short of the LG G3 even, let alone battery life monsters like the Sony Xperia Z3. Granted, it is not that far off from the direct competitors, like the Galaxy S6, the iPhone 6 Plus, or the HTC One M9, but this only comes to show that we don't have any significant gains in battery life with the flagship crop so far.

On the charging time front, the G4 delivered a bit over two hours for a full top-up with the supplied LG charger. This puts it in line with most other flagships, save for the Galaxy S6, which charges blazingly fast. All in all, you will likely have to juice up the G4 at the end of each day with normal usage, as is typical. Thus, it is a wise decision to create it with a swappable battery, so you can carry a quick spare with you, if you are leaving for a weekend away from a charger.

Battery life (hours) Higher is better
LG G4 6h 6 min (Poor)
HTC One M9 6h 25 min (Poor)
Samsung Galaxy S6 7h 14 min (Average)
Sony Xperia Z3 9h 29 min (Good)
LG G3 6h 14 min (Poor)
Charging time (minutes) Lower is better
LG G4 127
HTC One M9 106
Samsung Galaxy S6 78
Sony Xperia Z3 235
LG G3 120

Related phones

  • Display 5.5" 1440 x 2560 pixels
  • Camera 16 MP / 8 MP front
  • Processor Qualcomm Snapdragon 808, Hexa-core, 1800 MHz
  • Storage 32GB + microSDXC
  • Battery 3000 mAh(18.5h talk time)



1. shiftt

Posts: 333; Member since: May 03, 2015

Wow, the LG G4 has bigger bezels than the LG G3 and it has worse battery performance? See, reason #2,234 why I'm disappointed in LG this time around. Rating 9.2?... Smh

9. rd_nest

Posts: 1656; Member since: Jun 06, 2010

Let's do some maths, shall we? S6 --> 434 min / 2550 mAh --> 10.21 sec/mAh G4 --> 366 min / 3000 mAh --> 7.32 sec/mAh Do you guys see how much efficient is Exynos now? Now consider the fact that the Exynos is easily much faster than Snapdragon, this just shows a huge advantage of efficiency for Samsung. Faster processor --> less time to perform a task --> processor goes back to sleep faster --> combined with higher efficiency, this makes it a killer combo.

14. talon95

Posts: 1009; Member since: Jul 31, 2012

Screen has more impact than processor, I'd say the latest AMOLED must have a big impact as well.

19. rd_nest

Posts: 1656; Member since: Jun 06, 2010

Yes, defnitely. I am not including screen here beacuse PA mentioned they run a webscript to test battery life. If it cycles through various web pages and apps, then many times the screen would display a lot of whites, which could be little disadvantage for AMOLED.

58. epdm2be

Posts: 830; Member since: Apr 20, 2012

You probably mean "...the screen would display a lot of whites, which would be BIG disadvantage for AMOLED."

26. ShaikhJGI

Posts: 361; Member since: Jan 10, 2014

+1 Well said. That Amoled panel on S6 is one killer of a display in every aspect.

33. hellbread

Posts: 309; Member since: Nov 21, 2014

So, why is than Sony on first place here with old plain LCD?

36. TyrionLannister unregistered

Sony phones don't have LCD LOL. Z3 has a quantum dot backplane with an IPS panel on it. Also, they have huge batteries.

48. hellbread

Posts: 309; Member since: Nov 21, 2014

Why are you being smartass? IPS (In-plane switching) is a screen technology used for liquid crystal displays (LCDs)... google it next timehttp://en.wikipedia.org/wiki/IPS_panel Or just look at PA under display / technology part.http://www.phonearena.com/phones/Sony-Xperia-Z3_id8764

66. TyrionLannister unregistered

Why are you being dumbass? IPS is just a switching technology. It doesn't mean the thing underneath is LCD. Z3 uses a blue backlight with phosphor on top of it.

70. Kakarotto

Posts: 255; Member since: Dec 07, 2010


71. TyrionLannister unregistered

IPS is usually used in the panel of LCDs. But the Xperia phones have a quantum dot display with IPS on top. What it means is it's kind of hybrid between a QD and an LCD. The backplane is made from blue quantum dots and not the usual white LEDs.

51. Taters

Posts: 6474; Member since: Jan 28, 2013

Sony has some kind of software where they use already loaded pages when still available so it doesn't have to refresh. I forgot what it is called but it seems quite effective. I think AMOLED and plasma displays have to refresh instantly in order to operate which is why they don't have those 60 hertz or 120 hertz ratings and that software trick doesn't apply.

75. rd_nest

Posts: 1656; Member since: Jun 06, 2010

That's called PSR - panel self refresh. It's a standard technology used by many vendors. Nothing out of ordinary. It was available from the time of Exynos 5250 (your SOC also needs to support this feature). Pretty standard stuuf for most vendors. And AMOLED displays can have much high frequency compared to any other display. 60/120 Hz is nothing compared to what AMOLED can give you. Now whether you need such frequency is a totally different question entirely.

17. shiftt

Posts: 333; Member since: May 03, 2015

Sorry, but um.. where does the S6 come in? I was comparing the LG G3 and G4. I could care less, the S6 beats the G4 hands down but that's pathetic that they have the same battery capacity and still the G4 dies before the G3. Your "math" is irrelevant to anything I said.

22. fonelover123

Posts: 153; Member since: May 04, 2015

i dont trust their review on the battery performance its impossible for the g4 to got a weaker battery than g3. there were already reviews conducted by other experts and they found out that g4's battery has really improved from last year's g3 and proven better and performed longer than the g3. this is not accurate battery test. i don't know if you guys can still remember sometimes PA did mistakes in their battery tests for the G3 and other phones so i will not be suprised if sooner there will be a changes for this.

27. ShaikhJGI

Posts: 361; Member since: Jan 10, 2014

Link from other experts please.

37. remotespeed

Posts: 9; Member since: Mar 16, 2015

By the same Math's - would the Sony z3 not be even more efficient than S6?

76. rd_nest

Posts: 1656; Member since: Jun 06, 2010

Yes, that's obvious. Because it's has much lesser pixels and the SOC is much weaker. It's isn't that hard to grasp right?

63. sunjay140

Posts: 118; Member since: Mar 19, 2015

It's the screen and not the processor.....Mr "Muh Exynos".

65. SherlockHolmestr

Posts: 2; Member since: May 04, 2015

Ummm, you do realize the s6 has quick charging 2.0 and the g4 doesn't right?

79. Bocan

Posts: 1; Member since: May 12, 2015

I registered only to tell you how dumb you really are. Phonearena's test had a major flaw. They set the screen brightness at the same percentage, but little did they know that, for example, 50% brightness on the S6 is less bright than 50% on the G4. In Ars Technica's test, which is more accurate, all screens were set at 200 nit (unit for measuring brightness on screens), and the G4 lasted for 583 minutes while the S6 only lasted for 439 minutes. The AMOLED is only efficient when showing deep blacks, but when showing white, it actually consumes more energy than an LCD. The Exynos chip is more efficiant than Snapdragon, but that's only because it's made with 14nm technology, meaning it can fit more transistors, while Snapdragon is still on 20nm. This will however change with Snapdragon 820 coming later this year. One thing that's really bad about Exynos is the lacking of custom ROM's. Most devs aren't supporting Exynos due to the lack of a proper source and documentation of the chip.

80. SherlockHolmestr

Posts: 2; Member since: May 04, 2015

False. If you are comparing nits (dude they know what nits are...) you are inaccurately measuring the two devices. One device that can achieve 575 nits vs. one that can reach 675 is NOT an accurate comparison. 200 nits on one display would be handled very differently than on the other. 50% brightness shows how well each phone can handle it's OWN display at a given brightness level in comparison to another. Using 50% shows how efficient the display itself is. If one phone is far worse at it's own half percent than another, you can show that the phone is worse at managing the display it has on it. Nits are not an accurate test because the minimum and maximum of each phone is different thus throwing results. Also 200 nits is less than 50% on both of these phones.

10. Simona unregistered

well it is weird as here : G4 has 2900 battery ? https://www.youtube.com/watch?v=QLGeWxqV_k4

18. rd_nest

Posts: 1656; Member since: Jun 06, 2010

Generally battery capacity is mentioned as Typical and Minimum. LG's specs page mentions: 3,000mAh (Typ.) 2,900mAh (Min.) Meaning you could get either of these, normally that would specify the larger number.

11. KParks23

Posts: 748; Member since: Oct 13, 2010

No way it has worse than my g3 with this POS lolipop update my phone gets 105 degrees and dies in 5 hr 100% to 0% 5 damn hours!

55. Taters

Posts: 6474; Member since: Jan 28, 2013

I still have the Z3 and lolipop knocked like a day or a day and a half from it as well but it's still crazy. Even with location services always on I still get a day and a half of relatively heavy use but it's not invincible 3 days easily like it was on kit kat. I have to turn location services off for my GS6 to beat the Z3 with location on, Lolipop is still one power hungry sob though.

59. epdm2be

Posts: 830; Member since: Apr 20, 2012

"... knocked like a day or a day and a half from it as well..." Weird isn't it? It has a flat and ugly UI (which uses less resources), there's supposed to be that "project Volta" as one o/t main attractions and there's a supposedly better run-time (ART instead of Dalvik) etc... Yet they can't seem to fix the bugs and it performs worse instead of better? I mean, come on, on the same device (that runs Kitkat) e.g. G3, Lollipop SHOULD run better than KitKat! I wrote before. Since Andy Rubin is gone from Google Android is getting from bad to worse. Coupled with manufacturers aping iPhone S6-devices in design and no wonder why the Android geeks are upset. If we wanted locked down iPhone-clones then we'd bought them... We didn't because we want an open platform that can be used longer then the usual lifespan of a fly!

72. jesus_sheep

Posts: 279; Member since: Apr 18, 2015

I have a question. How long have you been having the Z3 for and does it have any cracks yet?

12. donrox

Posts: 204; Member since: Jul 18, 2014

The G4 is taller, wider, thicker and heavier than the G3 with an even worse battery life! it also performs worse than all flagships released thus far. I'd consider it a pretty good mid ranger if it was priced accordingly, but it isn't. the G4 is a failure imho

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