No charging at all. Use it anywhere and its's 100% full charge. 5 year shell life. Also when done throw it out. I use it on everyday. I travel constantly. No more carrying a charger or charging back up juice. Convenient and easy to use. I came across this at the one of the fair and been using and buying a lot. I have stock in this and the reason for me to post because I just figured it out that this product already come out it also benefit me and whole lot of people. With instant power I don't ever need to charge my charger. With Energous. They both are definitely will change the world. Get one and you know what I mean lol