I have a multitude of this same problem, I bought three batteries and placed them on a charger after opening. The first one never had any LED lights come on, the second and third had the problem described above. I have one blinking LED light but it will not charge. I did find out that that battery is still good in sorts after reading the manual. Holding the "On" button for 5 secs will give you the overall life of the battery. So in conclusion, I have one bad battery and 2 that will not charge but have good life. I hope that this is fixed.