You must have a bad cell. It is dropping voltage badly, and letting the pack voltage get low enough so that the lvc kicks. I can pull the bad cell out, or at least test the pack, but it may be cheaper/easier to just buy another pack, those packs are about 40 bucks new...
I have a neu energy pack that should be here tomorrow but I was just seeing what could be wrong. I figured it might have had a bad cell. I have only had it since january and have only charged it about five times a week sometimes not using it some weeks.