TeacherTabletPC

From TabletPCReview.com, Tablet PC Battery Life: How Wireless Affects Power Consumption

For those that saw a couple of formulas and graphs and skipped ahead to this part, I don’t blame you, here are the take aways based on the data:

• Simply turning on the wireless card doesn’t drain much power, it might shorten battery life by 2%, so if you want to remain connected to download email it’s no big deal.
• If you turn on wireless and are constantly trying to acquire a connection, such as if you’re constantly dropping a connection and then trying to reconnect, your battery life could be 6% – 7% shorter than usual due to the wireless card having to work extra hard.
• If you have wireless card on and are transferring lots of data, such as downloading large files or constantly browsing the web, battery life could be about 6% shorter than simply no wireless on. Consider downloading large files later when you’re plugged in.
• If you don’t need to use the web, turn wireless off, it’ll save you at least a few short (but maybe precious) minutes of battery life!

In my in-class use of my tablet I have generally just left the wireless on, in case I decided I wanted to hit the web or grab something from the server, unless I was having connection issues, in which case I’d turn it off mostly to avoid the annoying continual popups telling me about the connection issues while I’m busy trying to teach.