These HTC One devices are going to be great for multitasking and what not but my major concern is battery life. I want to recommend an app that will definitely help preserve your battery life. Many smart phone users don't know that when you multitask and run multiple apps you leave apps running in the background. This is where your battery loses a lot of juice. I like to use TasKiller Free to help me with this.
Lets say that are running multiple apps and then need to close them down. Going in there and doing it one by one will take a long time and be kind of annoying. Just run TasKiller Free and follow the straightforward instructions to close down all of the apps running in the back ground. This should help at least preserve some of your battery life.
for more information visit the TasKiller site.