What are some of the things I can do to make my iPad (Wi-Fi) battery last a long time once it is charged?
I have the first generation iPad and run iOS 3.
If you don't need to connect to a network turn off WiFi. You will also want to go into the Settings:
For additional help, I wrote up an article here with pictures: http://www.squidoo.com/prolong-iphone-ipad-ipod-touch-battery
In the end, it really depends on how you use your iPad. Good luck!--
Additionally, your iPad’s battery life will eventually last longer if you follow the Apple’s Advice, specially regarding battery’s temperature.
Killing apps manually will not affect battery life without effecting user experience.
Apps that stay active in the background typically do so for a limited time because they have a specific task that needs completing (like completing a download, or sending a mail message.)
iOS manages background processing aggressively in order to ensure that no extra battery is used unnecessarily.