I got my galaxy s2 6 days ago and I had to go back to my iPhone 4 coz the battery on this phone is just horrible.
I even tried using battery save mode, samsung battery save mode, everything, but it's just not the same.
I did a simple test:
-Full charge both phones
-Airplane mode on, wi-fi on with sync enabled (email etc)
-Took them off the charger at same second
-Left them for 1 hour
After one hour:
-iPhone 4: 100%
After ~8 hours:
-iPhone 4: 100%
Is this a problem or just a bad phone/system? Should I call samsung support to get a replacement?
I've been searching for people with the same problem but I haven't seen
What firmware are you using as the newer firmware is better battery wise
Do you plan too Root your phone as that can help also.
The S2 is a good phone once you get used to it
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If the Iphone's battery reads 100% after 8 hours then I don't think much of the accuracy of the iphone's battery level indicator.
as For your gs2 I wouldn't give up on it just yet. there are things you can tweak to get the most out of your battery. My guess is you got some sort of data sync happening way too often. Check your widgets on your home screens and also see if there are adverse wakelocks happening.
Other than that you can always get a higher capacity battery.
Device: Samsung GT-I9505 ROM: Danvdh GE 4.4.2 Kernel: KT GSM: XXUFNBH LTE: XXUBMH1 B/L: MGA
the current version ur running, KI2, is android 2.3.4, and u should really notice a big difference compared to ur previous firmware. i dont think u need to update via Odin any more.. there's a firmware running 2.3.5 now, but i personally dont find any improvements in anything, and definitely no battery improvement, so just stick with it now.. my phone consistently lasts 24 hours or more, with average to pretty heavy usage
Samsung Galaxy S2 - Android 2.3.5 (XWKJ2)
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I just got stitched up with 2 fake batteries, well, apparently they are genuine and I am aware that some batteries are 'finished in china' out of the box, but my 'FiChinas' are kinda duds, only get about 65% of the life of my original Korea only battery, One seems to be better than the other, they start off good, but after it hits 50% they really drop off almost like magic.
the FiChinas weigh a bit less too, but better than nothing.
If anyone KNOWS anyone on ebay selling genuine Korea only batteries let me know, I'll be flying over with the batteries next time if I have to return another pair.
Last edited by Gearu; October 14th, 2011 at 01:14 AM.
After 1:30 hours I decided to use the devices a lil bit, since people said the battery levels on the iPhone could be wrong.
Now (~12 hours):
iPhone (with heavy whatsapping): 77%
Samsung Galaxy S2: 15%
So I loved the phone but this battery situation is outrageous.
Really? This sh!t should work properly from day 1. Users don't need to do that kind of testing and also they shouldn't be looking for better batteries on ebay.
Looking at those results, the only way to tell whether the batteries of both phones are functioning at its optimum performance (a risky endeavor considering the following suggestion might wear your lithium-ion battery's lifespan - so you've been warned...) is to use both phones to the point of critical battery status. A phone whose battery is not calibrated properly or is worn out / damaged will shutdown unexpectedly within 5%-15% of remaining battery life. On personal experience with older phones and some recent models, phones with proper calibration commonly die within the battery state of 1%-3%... Consider this in your next test.
You'll need to see what apps are installed and running in the background as "services" in the iPhone and also your samsung phone. The more background services you have running, then most likely your battery will deplete faster. These services tend to make biased and inaccurate battery benchmarks so if you got a good grasp on the phone settings, then terminate all 3rd party app services on both phones except for the phone's main services on your next test.
Both phone's OS fancy bells and whistles like home screen animation etc. (and stuff like widgets) should be considered prior to testing. My recommendation is to turn all settings on, and widgets OFF in both phones and see how far your phones will go... if you're benchmarking of course.
Wont say much about phone features because everyone knows stuff like GPS, WiFi etc reduces battery consumption greatly in long periods of use. The only thing technical I'd like to point out, is that for some features (such as WiFi/Data Network) the polling refresh timing and scanning power in scanning new WiFi access points or obtaining internet access directly from your network provider's data network is OS based. From personal experience, those values are normally hardcoded in phones firmware and are different with each manufacturer. There's nothing much you can do about changing that unless you're a ROM developer or a knowledgeable phone hacker/tweaker/enthusiast... all I'm saying is, that different manufacturers have different settings... and this affects your phone's battery in a way.
But if you're still not happy... you can always return the phone back and make a complaint to have the battery replaced... or phone, I'm sure the shop you bought it from will have no qualms with you on this.
Last edited by naith_kk; October 15th, 2011 at 01:36 AM.
Reason: adding "widget" point.
The Galaxy S2 (sometimes known as the Galaxy S II) is the follow up to Samsung's widely successful Galaxy S lineup. This time, the Galaxy S2 raises all the stakes and Samsung has found a way to double almost every spec in a true, one of a kind ... Read More