I lent my bike to a buddy, he ran the battery down, trying to restart it after a get off, and now the bike wont recharge the battery... Would running the battery down to the point where it wont turn the bike over anymore, kill the batter stone dead? This is the third new Battery that I put in the bike this spring, and at 70$ a pop, Id like to figure out whats happening with the batteries? The previous batteries I concluded were being drained by the electrosport headlight kit which ran everything off the the ac (or dc I dont remember). So I went back to the stock headlight setup and thought everything was fine. In fact it seemed to be fine, as I ran the bike myself for a couple tanks of fuel without issue. Now this happens and I am wondering if the bike is still running down the bat. How do I test the charging system to ensure everything is cosher???