Top be fair, most people wont want/need the level of info you're asking every person that comments on battery life to give. Screen on time is enough to give an idea.
I can use my phone the same way on two different days and it'll give different battery life. Giving that much depth is a waste of time in my opinion.
Indeed, plus battery life can change due to updates etc.
My SGS2 lasted barely a day when i got it on 2.3 (or was it 2.2?). When it eventually got to 4.0 it was doing 1-1.5 days and my usage had stayed the same (if anything I was probably using it more towards the end!!)
rp2000
The thing is though, these sites (apart from anandtech and gsmarena) might as well not bother posting any info. then other than it lasts throughout the day... as what every site so far has posted (apart from anandtech) is completely pointless, none of the sites have even stated screen on time (EDIT: actually I think one or two have....) or brightness (2 most important things), just say the usual "tons of browsing, tons of games" what does tons mean? I would consider more than one hour on the one game to be a "ton" not what they probably mean, which is like 15 minutes. And going by the battery life they did get, I am guessing it wasn't "tons" of gaming as the phone would not have lasted as long.
Heck one site didn't even have signal the entire time and plugged the charger in multiple times and didn't even charge it fully to 100%....
It doesn't take much longer at all or much effort to take 3 screenshots and upload them to imgur etc. (1 for the on screen time, 1 of the apps usage and 1 for the history showing wifi, awake time etc.) and to write a quick summary stating rough usage i.e. 40 minutes of browsing, 15 minutes of games, 20 minutes of phone calls, weather syncing every 2 hours and emails as well as facebook etc. syncing every 1 hour and brightness set to auto (or in the case of manual control mostly, 30% and 0% at night time for like 1 hour)
All the info. on battery life is just so pointless, for all I know these review sites could be using their phones similar to what I am on my S in which case 14 hours is exceptionally poor or they could be absolutely hammering them with 70% brightness, playing only games, weather etc. syncing all the time in which case it would be superb.
If you look at it like that, then you could also say the exact same thing about benchmarks for performance, all the hardware detailed info etc.
These are review sites, which are suppose to give us relevant and accurate info. on all of these areas. Only anandtech and gsmarena are the good ones when it comes to stuff like this (although as said, their benchmarks don't seem that accurate when it comes to real world usage, but it gives you a general idea as to what to expect and a far better representation than these other so called review sites).