I have an Old 2DS that I hadn't picked up in a year due to it not turning on (Which I assumed to be from a dead battery). Recently I got a new battery for it and put it in, then began charging it and to my surprise, it turned on! The problem was that it didn't seem to charge past one bar and when I unplugged the charger, the red flashing LED would pop up. I could still play as long as it was plugged to the charger, but I had made a mistake and left it unplugged for a bit too long, and it lost battery completely. I had let it charge for over a day and it just wouldn't turn on. I have took out and reassembled the battery numerous times, and nothing changed. Even let the battery sit out for over five minutes and put it back in. It's needless to say that the charger works because the orange LED does show up when I plug it in, on both my 2D and 3DS. I feel there is hope for the system if it had at least charged enough for it to turn on at one point, I just hope somebody could please help me or leave suggestions to fix this.