Poweranimals

Compared to previous Galaxy models. As an S1 owner I can tesify that the battery life kinda sucks. It's really rare for me to go out during the day and not have it die or be low battery by the time I get home. Keep in mind I kinda like to use it a lot.

Gomjaba

You use it heavily as mini computer : battery will be shockingly low.
You use it solely as a phone : battery will be amazing.

Same as with all other smartphones

RajCaj

There is so much variability in estimating that, it's hard to tell.

-Cell Signal Type & Quality
-Active Widgets
-Rigor of usage (Web browsing, or multimedia device)
-Screen Brightness
-etc...

What is worth noting is that the screen will be using SuperAMOLED, not the more energy efficient PHOLED used in one of the prototypes. Screen size will be increasing by a little bit, and also with a higher resolution.

Also, the SGS4 is being marketed as a "Life Companion", specifically around tracking real time biometrics with a various number of bluetooth accessories. If you're walking around all day with your arm / chest band (requiring bluetooth radio to be On), and exercising with some streaming music service on (requiring one of the data radios on), I'd imagine that extra 300MaH of batter power from the SIII will be easily negated.

But again, experiences may vary according to use.

FinancialWar

ZeroLemon will probably release a 8000 mha battery pack for S4, so as long as you don't mind the thickness of the phone, you shouldn't worry about battery life.

That is why I love Samsung over other brands, removable battery!

Getting HTC/Sony/Iphone et al. is like buying a Assault rifle with non-removable magazine, once your out of bullets, you can't change magazine. If you were a soldier, would you buy these type of assault rifle?

Slug

That would depend on what sort of soldier I was. An accurate sniper who makes every shot count might not need more than a single mag. :-)

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FinancialWar

go use a sniper rifle that can't change mag. I'll stick with a sniper that can change mag.

Slug

Fine, that's your decision. Others may have different priorities - Android is all about choice, remember?

OverByter

While I definitely agree that phones should have removable batteries AND storage, and while it might not be fair to make this comparison, having a non removable battery shure as hell doesn't seem to have hampered the iPhone since launch.
OB

Cobravision

Based on nothing by but speculation, I'd expect the S4 to last at least and long as the S3, probably a bit longer. The 1080 screen does take more juice processor-wise, but they've redesigned the screen to use less energy, so that may be a wash. At which point, the extra 300 mAh should give the S4 more oomph. And if the big LITTLE octocore works as planned (assuming your model has one) there's even more energy savings.

The greatest thing is that the phone is under 8mm. You can shove a huge aftermarket battery in there and still come out with a relatively thin phone.

rushmore

IMO, most battery discussions are kind of moot, since too subjective as noted above. What matters is your own use and comparisons, or a lab type comparison using the same process for each.

Non fixed battery means there are options, but would be nice if Sammy released their own exteneded battery at launch along with a clamshell case/stand to fit it. HTC seems to be the only company that does this. They did with the Rezound, but their new devices have no battery option by default.

GatorfanDroid

It better last longer then 5 hours on medium usage . My htc thunderbolt can get barely 3 hours of full usage before charging it.