I have a Powercore 13000 purchased in 2016, meaning the warranty is expired. It refuses to take a charge. The first light flashes when plugged in, but it won't power up no how long I charge it. I have tried multiple cables, multiple chargers and different outlets. Have also tried looping the cable back to the unit to "reset". Nothing.
Any final strategies before this thing goes to the trash? It's pretty disappointing given it was probably cycled <30 times total.