I've had a Surron LBX for about 3 years now, it's about like a 100cc dirtbike. The battery pack is Panasonic and good quality. It sits all winter at my house and doesn't lose charge. I used to ride in and out of town on it to get groceries, but I think the local police have wised up so it's just a farm bike now. 1800 miles so far. Maintenance is... plugging it in and airing up the tires sometimes, that's all.