A:AnswerThere is no option to use a memory card. All pictures and video is sent to the device controlling the drone. Your phone would be recording all the images.
A:AnswerI was able to get it up to above a 2 story building, but the wind started to take the drone. I would say the max height is going to be based on where you are, inside outside, and the connection to your phone.
A:AnswerWithout the added stuff yes, with the added stuff, it comes with three with its own charging station for all three batteries. If you get the extra stuff, you can switch out in a sequence which will prolong your airtime.
A:AnswerThe Tello can only be controlled by a smartphone. You can use a Bluetooth controller to improve the ergonomics, but it all has to go through a phone.