I use the app called Battery Left Pro and it allows you to calibrate two different batteries which I wanted because I use both the BH5X and BH6X batteries. You don't want to run the batteries dead consistently, but just doing it once or twice during initial battery calibration isn't a problem at all.

 

Yes, my Droid X is unrooted.

 

if/when you root, you can try this: https://market.android.com/details?id=com.nema.batterycalibration&feature=search_result

 

Okay, a couple things:

- First of all, ignore the people who tell you never to run a lithium battery down. It's true you shouldn't discharge lithium batteries all the way down but there isn't a piece of consumer electronics around that doesn't shut off BEFORE that point is reached. When your phone shuts off because of a lack of battery power, there is still juice in your lithium battery. Just not much.

- Second of all, calibrating with Battery Left will not help. What you need is to calibrate your system. Battery Left has its own calibration but it will not help your phone. Yes, you should charge your phone all the way up and use it until it shuts off, which will re-generate your battery stats.

 

Battery Left uses a very subjective metric based on past usage. It will improve with time but it's not actually displaying the amount of battery you have left - it's displaying approximately the percentage of overall time it thinks you have left. It constantly calibrates itself.

So, if you typically get 12 hours of usage out of a battery, it's going to display 50% at the 6 hour mark - give or take a little for adjustments on its part. That may be accurate, but it may not be. If you played a bunch of games in the first two hours, you might have killed half the battery, but BL isn't going to say that.

 

Probably not. That would help Battery Left calibrate, but the stock battery meter takes voltage measurement samples to calibrate itself, which don't care about "typical" or "abnormal" usage.

The voltage at 50% is going to be the same whether you left the screen on and a movie playing to get there, or whether you did occasional web browsing for a while day.

 

That's kinda weird. Mine always recognizes a new battery appropriately.

Maybe you've got some whacked out battery stats. Might be worth rooting just so you can clear your battery stats and start fresh.

 

Not much to learn, I promise.

Go here:

[APP] z4root - xda-developers

Download the app to your SD card (on the phone is fine, or on your computer and just copy it over), open your "Files" app in your app drawer and navigate to the file you downloaded, then launch it. It'll ask you if you want to install, hit yes.

Reboot your phone, then launch the app in your app drawer, and select "permanent root." Once it's done rooting (it could take several minutes, don't panic), it'll reboot your phone. Boom, done.

 

There's a whole lot. Hang out in the Root section for a while.

You can flash custom ROMs, people have created customized/optimized versions of Android that you can use.

You can remove the apps that are installed by default, like Blockbuster or Amazon MP3, or Madden, or whatever.

You can theme your phone - modify fonts, colors, menus, icons, etc.

Some useful apps like Titanium Backup, where you can make backups of your apps and their data to your SD card. There are a fair number of root applications. A small list can be found here but there are lots of others.

Overclock or undervolt your phone, for increased performance or better battery life.

Lots of stuff.