A:AnswerDepends on the size of your popsocket. My wife has a case with credit cards on the back of her phone and this Nomad device still charges her phone.
A:AnswerI would suggest not. This is meant to be used on a desk or nightstand. If you would like to then I guess its possible if you have an outlet inside your vehicle
A:AnswerProbably, I have a spigen credit card case and with an ID and plastic credit card it actually still charged through the case. Doesn’t work with metal cards though. Not sure how thick the defender case is but can’t imagine much thicker.