Studio beats 3 wireless

My beats were bricked cause of a low battery so I left them charging and after I did the factory reset where you press the power button and down volume and it got it to where it’s a full set of lights and a flashing red light. I got it to connect and the iPhone said it’s at 100% battery but disconnect after 3 seconds. Now I’m charging them but it’s not flashing it’s only a lighted one led light and won’t go up to two lights. Any help