I am also new user I9505 since middle July.

Facing the same problem. Going mad a few days and disable all S4 functions. But the problem remain.

As suggested by the former, install Wakelock Detector.
Found out that one apps wake the phone up about 200 times in only about 10 hours.

Uninstall and now the battery awesome. 

Hi Guys,

I just got my I9505 2 weeks ago.

Anyone here experiencing battery drain of 1% every 2 - 3 minutes when using 3g/4g to surf facebook or websites?

Hi Guys,

I just got my I9505 2 weeks ago.

Anyone here experiencing battery drain of 1% every 2 - 3 minutes when using 3g/4g to surf facebook or websites?

I'm currently still running on stock ROM, no root or any nonsense yet. I've brought the phone to Samsung, and they told me it's completely normal; they've also replaced the battery for me saying that this should fix the problem.

I just want to know if any other I9505 users are facing this problem; I can see that in Malaysia, most people are using the I9500 Octa - So I can't have a proper benchmark.

I'm looking at screen on time of 1 - 3 hours max; could this be caused by a defective unit, or could this be caused by a poorly optimized firmware?

I've used a HTC One for a few days, and I do not see the same problems, battery seems to last longer on that device though they're both running on similar chipsets, minus the fact the One is clocked at 1.7Ghz

Thanks

based on ur complain, u seem like a perfectionist .... or u never use high end smartphone before....ever since HTC Desire HD era , this is normal ..... 3g is draining the battery faster...and WiFi is slower....this is common....
and if u hope for SOT of 5hours , get a nokia 1100....

stand by time is about 7days as well....

u r expected to charge ur battery 2x a day if u on 3g from 8am to 6pm....or more than 2x ...sometime i charge 3x due to heavy usage....

@One Buck, 666devil & ginny88.

Thanks for your comments; much appreciated.
@steventan85

Doesn't seem like a very nice way to reply a simple notion; I've had the S2, Note and S3.

I think it's best not to jump into conclusions before truly understanding what the query is; and note, there is a difference between a complain and a query. I am merely querying why this is happening, as technology should improve, not remain the same.

But thanks for your recommendation, it will be duly considered.

Anyone knw when will samsung release updates of 4.3 for s4 ?

Yes, it's quite normal. Using 3G/4G for surfing drains the battery quickly. I've used a variety of smartphones and the drain can be as high as 1% every 1.5 mins. I don't think 1% every 2-3 mins on 3G surfing is abnormal. On WiFi the drain will be much slower.

if poor or bad signal coverage area, super battery drain yo!

I concur that is also true for my ipad HD. Use wifi battery drop 1% maybe every 3 mins. But use 3g definitely every 1-2 min drop 1%
I dunno how come u get better result in htc one, but most reviews out there reports s4 beats htc one battery duration...
Maybe u r n an area with too frequent signal switching(2g/3g borders) , or too weak signal. Worse still if using digi 

DG sux.. calling cheap, data slowpoke

DG sux.. calling cheap, data slowpoke