Hiding Power?

[Drake]

Android's don't have ki, they have artificial Ki and therefore can't be read without a scouter. However, Cell doesn't count. Also, you can lower your ki, but it can never become undetectable, however if you are in a large group of people or in a highly populated planet you can lower you ki to match theres and sort of 'blend' in with the background so as not to be detected.