A phone charger that only works when you recharge yourself

<img width=“750” height=“500” src=“https://flowingdata.com/wp-content/uploads/2023/12/recharge-dries-depoorter-750x500.jpg" class=“attachment-medium size-medium wp-post-image” alt=“” decoding=“async” srcset=“https://flowingdata.com/wp-content/uploads/2023/12/recharge-dries-depoorter-750x500.jpg 750w, https://flowingdata.com/wp-content/uploads/2023/12/recharge-dries-depoorter-1090x727.jpg 1090w, https://flowingdata.com/wp-content/uploads/2023/12/recharge-dries-depoorter-210x140.jpg 210w, …