Johnlgalt you are a big contributor to this forum and your advise is usually spot on. I agree with everything you said except for the bit about auto brigjtness. Certainly you could agree that running on the lowest brightness setting is clearly more battery efficient than running on auto. Auto brightness will regulate the screens brightness of course, but keeping it on low all the time is clearly more efficient than having it waiver higher or lower.
That said I would really like to figure out what is killing my juice. I have already factory reset and baterry pulled. I do not use a task killer (seriously folks are why are we still having this debate? You don't need one!), and I am very scrupulous about monitoring my baterry by using both the battery usage screen and the battery history screen (which is hidden - you need to use an app like battery left widget to see it). Nothing is different about my usage and no program is going crazy and my battery still lasts almost half as long as before. This is ridiculous.
The battery history screen is different from the usage screen which tells you percent of usage. The history screen tells you how long your phone has been running since unplugged, how long wifi and Bt have been running, your partial wake time and what apps have woken the phone from sleep and for how long, what apps use the sensor and for how long, what apps use gps and for how long, what apps have used the network and for how long, and cpu usage by app. I advise all of you to get an app like battery left widget or battery history or better cut (which will let you make the shortcut to the battery history which is just in android but hidden). I have found many a battery offender this way and learned plenty of qualitative info about my usage with it. You all should do this to see if you have an going nuts.
That said, what the heck is wrong with MY battery cause maps is not running rampant in my phone (no app is) and my battery still sucks. Any more tips? I'm still within a year I may need to swap this thing out. Maybe the update revealed a broken sensor or something.
If you keep the brightness at dim all the time it will definitely use less battery, but I ma actually referring to people who don't do completely dim / auto brightness, and leave their phone's display medium to high brightness all the time.
Furthermore, again, the kernel with FroYo is Overclocked to 800 MHz - as opposed to the stock 550 in previous stock ROMs.
No matter what your battery is not going to perform as well if you have things like sync, GPS, etc. running all the time.
I have seen claims that FroYo is better at battery management but I can say this after running FroYo for 3 months - it has given me no better, but no worse, results.
Another thing, and especially for those of us who have had our DROIDs for a very long time - LiON batteries have a (reported) 250 charge cycle before they start exhibiting issues with such things as battery not charging fully or lasting as long. I have had my DROID since day 1 - and even before I went to FroYo I was not getting great battery life from when I first got the phone. I know that I was OCd, and running a custom ROM, and running a ton more apps than when I first got it, but i was going ridiculous. I purchased a couple of spare batteries online as well as a battery charger, and those spares are lasting me about as close to my original battery when it was new as possible, given that I have ungodly amounts of apps installed as well as being OCd, and running a custom ROM.
Now, I have had my phone off the charger for approximately 2 hours now, and my screen was blank. I
just checked my phone's battery use and I have the following:
- Phone idle 28%
- Cell standby 21%
- Android OS 10%
- Wi-Fi 9%
- Display 4%
- Facebook 4%
- Maps 3%
- LauncherPro 3%
- android.process.acore 3%
- Scorecenter 2%
Battery level shows at Discharging and at 100%.
You be the judge.
Already did the full discharge cycle business twice now. No luck there. I will give it a few more days of tinkering things and then it's going back.
As for the extended battery, Seidio also makes an extended battery for the Droid, with a replacement door. It probably is more pricier than the verizon one though, it's like $70. It's either 2600 mAh or 2800 mAh, i can't remember.
My battery life is about 11-12 hours now, and that is with me using the phone for about 15 minutes every hour (running 25% of the time since unplugged). Before the update, this same usage landed me about 18-20 hours. I could certainly make it from 6:30 am to 11pm on a single charge and end the night around 20%.
So, you've performed battery pulls, complete discharges, factory resets, and it still happens?
Last thing you can try is to use the Master update from Pete's website and see if something got botched in the patching process when moving from 2.1 to 2.2/
Errr... Just-In-Time compilation should IMPROVE battery life, as it takes less CPU than direct interpretation. (The next thing would be static precompilation, but I digress.) However, it can make a CPU-bound program make the CPU use more power per clock cycle due to increased die utilization; that may be what you're getting at.
Which many of the apps that are in the stock system that auto-run and stay running probably are, eh? Or am I incorrect about those being CPU bound apps?
