I have had this light for about a year and use if infrequently. I went to use it the other night and the battery had run down so I put it on the charger. The next day I had a green light showing a full charge. Now when I pull the trigger, the light blinks green one time and changes to a red blinking light with no light output. The button on the top will turn on the three lights on the top. Any idea what my problem could be?