Does this still work when the phone goes to 0%? Assuming the battery isn’t actually at 0 here; or that the AOP could have its own tiny backup source to last a f

Does this still work when the phone goes to 0%? Assuming the battery isn’t actually at 0 here; or that the AOP could have its own tiny backup source to last a few days/week. Now that would be useful. I guess this use case is valid when someone naughty finds your phone and turns it off to try and hide it?