OK so this 662 grams is rather heavy. I was wondering about the option to: (1) Replace the back housing to plastic based cover. (2) Use smaller battery. Yes, I know: Apple has designed the iPAD this way for a reason. Yes, I know: If Apple has released the iPAD with a smaller battery, etc. ppl would complain about it. However, I would personally rather loosing 200-300+ grams of weight and be happy to sacrifice the metal housing and/or some percentage of battery life. If anyone knows of a valid solution, please share it with everyone. Also, if someone has the technical knowledge if using an IPAD 2 battery would work with iPAD 3, please also let us know.