Screen on time Wi-Fi vs Data

[-sandro-]

So I've been using the Galaxy S4 (with TW and GE ROMs) for 1 year and I noticed that the screen on time I can get with a full charge has some discrepancy between wifi and data compared to anandtech reviews.
I'm well aware these tests are not real life ones and you would never match those values but I do for wifi (more or less) but it's completely wrong for 3G/4G.

Wifi

http://images.anandtech.com/graphs/graph7107/56050.png

DATA

http://images.anandtech.com/graphs/graph7107/56049.png


On Wi-Fi I can actually get 5:30/6:00 of screen time from a full charge which is almost like the benchmark as I said, so if I use the phone the same with the same apps I should come close to the data benchmark, logically. But NO! I can only get at best 3h of screen only if i use the phone nonstop, if I leave it alone and use it sporadically the maximum would be 2/2:30 (it drops very fast on data while on stanby compared to wifi). So how the hell does anandtech benchmark get 5h on data? The signal strength is not the problem, I have full bars (-80/-70 dbm) for 2G, 3G and 4G LTE and I tried them all with the same results.

I'm starting to think that maybe the radio part of my device is faulty otherwise I just don't get it unless you can find some other explanation.

 

[tsupersonic]

I know Wi-Fi is supposedly better for battery life, but didn't know it was by this much. On my HTC One M7/Nexus 5, the margin is far less than that with full signal at my house. I've never done any formal "battery benchmarks" on those devices as battery life was good, but I'd the margin was about an hour, if not slightly more.

 

[-sandro-]

Yes exactly I would expect the same margin not like this.