My original battery which I believe was a Yuasa lasted 5+ years. I put the scoot on the battery tender if I ride less than every 3 days. My replacement battery is in the third year of use with no sign of failure. I got a mid range battery at a local Battery Exchange in Oregon for $36. I ride mainly for fun and to run short errands. The original battery had not failed but I just did not want to push my luck.