Hello. Most model airplane batteries these days are lithium batteries, so this is a no-brainer. As for the choice, it depends on what you are focusing on: performance, lifespan or endurance? Or other. I don't know if you've heard of ovonic. I also have two 5200 mah ones. I use them to play with model airplanes almost every weekend. There have been no problems with the battery for over six months. them a try. (Purely hand-made, hope to adopt it)
Yes.
The batteries used in car and airplane models are both lithium polymer batteries and they are both interchangeable.
"Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses non-aqueous electrolyte solution.