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My upload speed is five time faster after the update. That should mean the transmitter is powered on much less time for the same amount of data transfer. The radio transmitter is definitely a battery hog. Even if no other changes were made aside from the data speed, I'd imagine that there is at least a slight bump in battery life unless you are using wifi 100% of the time.
John
For me with my Atrix rooted & deodexed on 1.8.3, my battery has been WONDERFUL! With liitle to no usage in 4 hours, it will only drop 5%. Before, with 1.5.7 and running Gingerblur, I sometimes had to charge up my phone half way through the day.
Here is a very good article that describes odexed and deodexed:What exactly is deodexed?
WHAT IS AN ODEX FILE?
In Android file system, applications come in packages with the extension .apk. These application packages, or APKs contain certain .odex files whose supposed function is to save space. These

Are you rooted with a custom ROM on your Atrix?I still haven't gotten the update yet![]()