I just got a bike that really wasnt ridden that often, the battery died right away since it hadn't been ridden in like 3 weeks. I had a buddy come over, and we took out the battery and attached it directly to his truck battery with jumper cables. after about 5 min of his truck running, we put the battery back in. It works fine now, and has for the past 3 days. It read 10V before, and 12.75 after the charge. To charge the battery, at least on a honda CBR, it needs to be above idle as well...... it seems to only charge the battery when you ride it. at idle it puts out 12V... higher and it actually charges the battery.