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I just have Backgrounder, Quicksms, Sbsetting and Makeitmine installed and battery life as normal to when it wasn't Jailbroken.

Edit: battery drain increased for some reason.
 
my iPhone 4 took 10 hours last night from 2am til 12am, after i removed it from the charger (while i slept) to drop from 100% to 99% and this is post jailbreak.

My battery life was pretty much the same the night before: pre-jailbreak.
 
Mines better if anything, 24 mins use and 3 hours 33 mins standby and I'm on 99%. Although I only just ran my battery down completely for the first time yesterday (JB'd as I was charging) so I dunno if that made a difference. Much better than my first i4 though, that dropped like 20% overnight, same as this one did before I ran it down.
 
mine seems to be running down faster...

installed
winterboard (minimal use)
bitesms
intelliscreen
makeitmine

nothing heavy..?
hmmm...
 
There are a few threads like this - some say it drains quicker, some say it doesn't. Nobody has been able to work out what it is, but mine certainly drains faster.
 
I had issues with the percentage running down faster than normal. I could figure out what it was. I recalibrate the battery about two weeks before the jailbreak was released so I didn't think that's what it could be.

I was wrong. Maybe something to do with the jailbreak messed with the battery meter's accuracy or it could have been a coincidence, I'm still not sure. What I do know is I let the battery run all the way down and charge the phone overnight with airplane mode on. I unplugged the iPhone at 10:30am yesterday and today at 11:05am I'm at 89%.

My phone seems back to normal. This is what I have installed:

SBSettings/Activator
OpenSSH
PrivaCy
Quickreply for SMS
GV Mobile+
MobileTerminal 426
AT&T Carrier Logo for iPhone 4

I deleted SpringFlash during my battery testing since some noticed an issue. I think I'll be trying that one again now that things are much better with my phone.
 
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