Underclocking method added to OP, as well as my elaborate explanation of what it is and how it all works.

Originally Posted by geicogecko

Anything I can do to extend my battery on stock factory ICS? I am going on vacation for a few weeks, so I don't have the ability to flash a custom ROM (which I'll do when I get back). Whatever Samsung/ATT did to this, they royally screwed up battery life. I'm lucky to get 10 hours of friggin' standby, whereas with stock rooted GB I was rarely below 50% after an entire day.

Best I can advise to you would be to turn your data off as much as possible, or to switch it to Edge/2G for the day (you can probably find a app to toggle that). Also keeping brightness at minimum if you don't already.

For when you get back though, you'll definitely notice the most significant change in battery once you flash a custom rom and kernel.

Originally Posted by geicogecko

Anything I can do to extend my battery on stock factory ICS? I am going on vacation for a few weeks, so I don't have the ability to flash a custom ROM (which I'll do when I get back). Whatever Samsung/ATT did to this, they royally screwed up battery life. I'm lucky to get 10 hours of friggin' standby, whereas with stock rooted GB I was rarely below 50% after an entire day.

Freeze any apps/bloatware you don't want/need using Titanium Backup. Easily added 5-6hr battery time with normal usage before I was able to figure out what was causing the most drain.

Edit: You can put your phone in Airplane mode. Not ideal since this will freeze all data, but if you're not using it because you're swimming or sky diving or whatever this might be helpful.

Originally Posted by kleinschmizzy

Freeze any apps/bloatware you don't want/need using Titanium Backup. Easily added 5-6hr battery time with normal usage before I was able to figure out what was causing the most drain.

Edit: You can put your phone in Airplane mode. Not ideal since this will freeze all data, but if you're not using it because you're swimming or sky diving or whatever this might be helpful.

Pretty sure on Stock ICS you can remove bloatware. And if he's stock, he wouldn't have root access to use titanium backup

Originally Posted by VanillaCracker

Found this while browsing threads:
*Please take the following lightly, and consult the comments posted on page 5*

"I used on trick which I have learnt from one of my technician friend working in Nokia. He told me that -

a) Always let ur battery drained completely and then charge. This will increase your battery life and performance.

b) Never plugin plug out ur charger very frequently.

c) Most important - Each battery is having reserve portion and if u want to charge this portion, then let ur battery drained completely ( i.e.till ur cell get switched off automatically) then plugin the charger in switched off mode and keep it off for next 3-4 hrs with charging. It will let ur reserve portion charged. You can do this once in a week.

Believe me, I observed tremendous increase in by battery performance." - Credit to Silver2706 for posting that

This is true for Ni-Mh/Ni-Cad batteries but not true for Li-Ion and has a detrimental effect on long term battery life and what it can store. This has been tested many times and if you even read anything about Li-Ion batteries, you find information as to why you shouldn't deplete your battery all the way down, nor "top it off" by replugging it in the charger after it has fully charged. There is no "reserve portion" of a battery that you need to "charge" up. Each cell is charged no matter what. Although it is true that it is better to leave your phone off while charging so the battery charger can maintain constant current to the battery and control temperatures better.

But now with newer technologies being developed, this shouldn't be a problem anymore.... hopefully... but people still do it anyways because thats just what they are used to doing, and they never really change.

My #1 tip is to get an extra battery and standalone charger to be able to charge each battery the same every time and not be limited by a cord, so you can just swap out the battery when it gets low.

Originally Posted by penguinlogik

This is true for Ni-Mh/Ni-Cad batteries but not true for Li-Ion and has a detrimental effect on long term battery life and what it can store. This has been tested many times and if you even read anything about Li-Ion batteries, you find information as to why you shouldn't deplete your battery all the way down, nor "top it off" by replugging it in the charger after it has fully charged. There is no "reserve portion" of a battery that you need to "charge" up. Each cell is charged no matter what. Although it is true that it is better to leave your phone off while charging so the battery charger can maintain constant current to the battery and control temperatures better.

But now with newer technologies being developed, this shouldn't be a problem anymore.... hopefully... but people still do it anyways because thats just what they are used to doing, and they never really change.

My #1 tip is to get an extra battery and standalone charger to be able to charge each battery the same every time and not be limited by a cord, so you can just swap out the battery when it gets low.

Thanks for the correction, I'll edit to remove the post altogether on the OP.

I had thought about just getting another battery altogther on many occasions in the past, but I'm really not a fan of having to carry an extra battery around everywhere I go....idk, just seems very inconvenient to me.

Extremely useful information.

Thanks a lot man!

i777 w/SHOstock

---

was getting about three days battery life. Light user, with power saving on.

Can someone shine some light on this? I have no idea how I'm getting such horrible battery life, I have turned off google backup but I'm still getting wakelocks. This has just started happening a few months ago. I'm on latest AOKP with Siyah after a full wipe.

Originally Posted by BestInGalaxy

Can someone shine some light on this? I have no idea how I'm getting such horrible battery life, I have turned off google backup but I'm still getting wakelocks. This has just started happening a few months ago. I'm on latest AOKP with Siyah after a full wipe.

Turn off Google backup

Sent from my SGH-I777