I have an old Kindle 3, it was "working" with the original battery but would need to be recharged within a day. I attempted replacement with this kit but it stays on the "Empty Battery" screen. I had charged it overnight and measured 4v on the battery. I swapped the original back in and the kindle booted normally. It seems like it is not seeing the new battery. What can I do to get it going besides the 15/30/40 "hold the power button" reset?