I bought this last spring to charge my scooter battery since it had been sitting all winter. It didn't work, but I assumed it was because the battery was so dead, so I just bought a new battery in April. FFWD to today, 8 months later, and new battery and riding over the summer - thing still won't charge. The battery is almost new and the scooter only has been dead for maybe a month or less. I'm trashing this. Its easier and cheaper to get a new scooter battery every year.See full review