When you download apps from the market you will receive the option to allow apps to "automatically update" or perform "manual updates." If you have 5 apps that need to update themselves, once those 5 apps have a data connection those apps will automatically update themselves. Having 5 apps downloading at the same time will draw a little power off of your battery.
I do manual updates so my phone doesn't try to kill itself trying to update an app. If for some reason the update starts but you lose connection to a data source, the app will continue to try and update itself. Thus you are going to lose some battery power if you do not catch it.
I do manual updates so my phone doesn't try to kill itself trying to update an app. If for some reason the update starts but you lose connection to a data source, the app will continue to try and update itself. Thus you are going to lose some battery power if you do not catch it.