open apps ipod touch do i need to close them

[jas72]

I was looking at my battery consumption and it's been much less recently that before OS4.

I just stumbled upon this article

http://support.apple.com/kb/HT4211

Do I really need to close all open apps after use?

Is there some method to have them switched off automatically when i close them?

 

[jas72]

I have noticed battery drain and just shut down 32 open apps. Nearly all apps that were there were open.

J