[Galaxy S II General] zee54:
I really don't understand why you people continuously have these debates about battery life times and wanting to compare it with others, it makes no sense at all.

Battery life can be affected by SOOOO many things, so you can't just look at which ROM or Kernel is being used and what your screen time is.

Firstly, how new is your battery? I have had my phone over a year now, so of course my battery will be far more worn out and less durable than someone who has only had their phone a few months.

Secondly, how many apps/widgets/accounts do you have set up that run in the background. A lot of the time batteries are drained because an app is having the phone work away in the background when it's not in use. Usually sync settings on emails and other accounts. But also if could be poorly coded apps causing wakelocks. Even how many widgets you have on your home screens can affect your battery, especially weather widgets which are constantly being updated.

Thirdly, and probably most importantly, how much do you actually use your phone?? So many people upload picks of their battery graph which shows their battery lasting for 1 or 2 days and then you look at the Awake and Screen ON marking and you can see that they have hardly even used the phone during the entire period. Of course you'll get great battery life if you only use your phone for 20% of those 2days! And you can tell this because on those same graphs you can see HUGE dips in battery life when the phone is actually being used for anything other than checking the time. Yes your Screen ON time says 4/5/6 hours, but what were you actually doing during those hours, was it just on and you were checking out your pretty wallpaper or were you gaming or browsing or youtube'n or anything else that will drain more battery life???

Finally, ROM and Kernel. Only after all of the above has been considered does the ROM and Kernel actually have any real affect. Even then you can tweak Kernel settings to be more battery friendly by limiting how much power your phone uses and how it controls other settings, so that may be different between users too.

So I really don't understand why you lot continue to compare charts thinking they are all equal and wonder why you don't have as good a battery life as others.

Everyone’s battery will be different depending on what their circumstances are on the above points. Personally I have a smart phone because... well because it's smart and it can do stuff, no so it can sit there on standby for 4 days. I fill my phone with apps, games and email accounts and actually make use of my phone and when the battery dies, well I charge it again. Simples.

No I can fully understand that some of you might be out all day and not have as easy access to a charger, so you need to be wearier of your battery life. Well then you guys need to look over the above points and optimise those to suit your personal needs. Buy a new battery, use your phone less or turn off data, use something like juice defender, edit your kernel settings, etc. But comparing charts with other people isn't going to get you anywhere.

As long as you don't have dodgy app causing serious wakelock issues then your battery is being drained because it is actually doing something you've asked it to do and which is, most likely, something useful.

There are just TOO many other factors to be considered when looking at battery life, not just your chart.