[Samsung Galaxy Nexus] KWKSLVR:
ROFL! 27 hours with 16% left and that's not great? What's your reference point because apparently everyone else owned mystical Android devices that lasted 48 hours with "moderate" or "heavy" use (whatever the hell that standard is). Dude, your phone has been going for a day, it's fine.

I've never seen an Android device sleep perfectly, i.e. if the screen is off it always "sleeps" until you turn it back on. You have data that's going to sync and you also have batteries that aren't read perfectly. Imagine it being more like a vehicle with a mileage range computer. It's by no means definitive.

You need to click the graph and really look at what your sleep activity is.

Also, there's no reason to leave your device plugged in for 10 hours, 20 hours or whatever weird time frame someone thinks up. It's going to charge until the cells are full, and then its going to discharge to probably 95% or 96%, charge back up to 100% and then immediately begin discharging. Pulling a battery off the charger truly at 100% is completely luck of the draw unless you're monitoring your milliamps.

This morning I pulled my phone off the charger with the battery reading at 98% and headed out for several hours of travel. I was on 4G for the first 1.5 hours, then after that I've been in 3G/1X area's. After 3 hours I had 89% left, so 9% over 3 hours, 3% an hour. While sleeping on 4G it looks like it drains at about 3%-4% hr like I said earlier, 3G is a solid 2% an hour. And again, it's an irrelevant statistic this early on based on how the first 10% of your battery acts.

I actually lied yesterday when I said System Panel was the only app I had installed. I forgot that I installed SwiftKey, and while it's not really fully compatible with ICS yet, it doesn't seem to run wild. So far it seems like there's a fair chance that any battery drain issues people are seeing are due to apps that are not optimized for ICS, and people not understanding what they're reading.

For example, under system panel right now it shows where "System Processes" are rocking the majority of my CPU cycles over the past 2 (and 8) hours @ 8.2%. OH MY GOD, THE PANIC. :rolleyes: Well OF COURSE they do, there's nothing else installed on the friggin phone to use CPU cycles other than SystemPanel and SwiftKey. ;)

If this device really could/can last nearly 34 hours sleeping while on LTE, then that's freaking OUTSTANDING battery life and people need to stop whining. If 10 minutes of use an hour cuts it to 1/3 of that, then 11-12 hours is still considered good battery life as a daily driver by Android standards. My Vibrant on the best ROM I've tried for battery life is good for about 30 hours on 3G and 56 hours on Edge...and that's basically never touching the phone, which is worthless and defeats the purpose of a smart phone. The point is that if you know what your phone does and doesn't do when you aren't touching it, then you can properly determine if anything is misbehaving.

Early in, I believe complaints of a battery bug are based on 2 things:

1) User Activity/Error

2) Use of Apps that have not be fully optimized for ICS

#1 almost always accounts for the largest number of discrepancies. Comparing battery life to one another is pointless, everyone uses their devices differently. You need to compare it against YOURSELF to see what you're doing/running that causes your battery complaints.