Apparently, that’s required for the App Store and Google Play. The guy behind it has said he has no intention of taking advantage.

As many as necessary, really. The only reason they start getting removed is because of the risk of infection and stuff being higher than the risk of complications with the surgery after a certain point.

It’s complicated, subjective, and probably varies country-to-country.

It’s more that there’s a higher risk of complications if they remove the old kidneys. However, they do start taking them out if you’ve had more than two transplants.

https://en.wikipedia.org/wiki/List_of_battery_sizes#Cylindrical_batteries

It would appear so not.