A:AnswerYes, you can download movies and such onto the iPad to later watch on a plane if desired. Common example: If you have Amazon Prime, you can download Prime movies onto your iPad and later watch it on the flight.
A:AnswerYou will need to purchase an iPad that has a 3G capability. If you purchase an iPad with just Wifi capabilities, it will not be able to turn into 3G capable.
A:AnswerHi,
I use my iPad every day almost all day, so I can't tell you how long the batter lasts in standby mode. However, I can tell you that because I use it constantly during the day and evening, it lasts quite long. It is usually around 25% when I'm ready for bed, which is after about 14 hours of almost continued use. I did leave it unplugged one day and noticed that I probably lost about 2% of batter power for the entire day. I'm guessing you'll get excellent batter power from this model.