I had Di2 put on my bike about 6 weeks ago. I do a fair bit of riding, although a lot of it is on the computrainer, where I do less shifting. Nevertheless, the battery died mid-ride today. First the FD stopped shifting, and maybe 30 min later, the RD stopped shifting. This made for a long ride back home. Lesson learned. However, I'm now trying to charge it with the brand new/out of the box charger, and I get nothing but a blinking red error signal from the charger. I made sure the temperature isn't too hot/cold in the room; I tried both the PC and the AC adapter to the wall (yes, I double checked that it is sufficient enough A); I've disconnected and reconnected the cables multiple times; I've tried a few different wall outlets. I'm out of ideas. Can anyone suggest something that I haven't tried? Thank you!