Concept Design for a portable charger for cellphones

Looking to design a portable charger for smart phones through the headphone jack. Often we see people who charge there phones using portable chargers have to attach their cords to a central device and it is just a pain. On top of that you have to make sure that the charger fits your phone. What if we could create a charger but through the headphone jack of a smartphone, this will make it a universal charger because all phones have a headphone jack. I have some drawings i can show if you are interested. I am looking for someone who can create a sleek modern design and have input in the project. Thank You