After someone claimed in another thread that he was only getting four hours of battery lifetime (and an extremely hot phone) doing nothing but playing music, I decided to put that to the test as I found that claim highly questionable.
Here's what I posted:
"I've stopped my battery test.
After nine hours of uninterrupted music playback with a varied playlist, there was still 55% battery left.
Heat from the phone hasn't been an issue at any of the times I've checked either. Back and front of the phone has felt slightly cool to the touch (somewhat confirmed by the battery temperature which read 29 degrees Celsius when I did the final check), and it's been lying on a thick blanket all the time in a room temperature of around 24 degrees C.
So the final number of hours if I had let it run the full course, may only amount to around half of those supposed 40 hours of music playback claimed by the iPhone (I've never seen anywhere near that on my 2nd gen iPod Touch, and if you happen to turn wifi on on that thing it sucks battery like there's no tomorrow), but certainly vastly better than those 4 hours macca__macca said he's getting on his GS2.
Unless he was just exaggerating greatly for effect - and this being my first smart phone I don't know from experience how good or bad the (realistic) GS2 battery lifetime can be considered - I would say that he definitely ought to ask for repairs or a replacement.
As mentioned in one of my previous posts, I used PlayerPro for this test with equalizer turned off and volume at 50% (right around or slightly higher than my typical listening volume) with headphones plugged in.
GPS and data traffic was turned on as usual, and there will have been some news feed and weather updates over wifi in the background while the music was playing. The screen has only very briefly been turned on a handful of times to check on the battery status.
Overall my impressions of battery lifetime still are as follows.
I plan for a daily charge with moderate to heavy use (with extremely heavy use, as during the first couple of days I had the phone and used it actively for many hours, an extra recharge might be needed).
If the phone is doing nothing but lying on standby - and doing the occasional news and weather update over wifi in the background - I've so far been able to count on right around one hour per 1% battery. So that could be as much as 100 hours on standby, although let's say 72 hours with a more conservative estimate."
