101 on batteries, they are only a few companies who make batteries, jci, johnson control inc. is biggest maker, they own optima and there made in mexico, we put stickers on them per manufacturer, die hard, everstart etc. the lower end have less plates and last less and lower cranking amps the better ones we put more plates in and you can tell by how heavy they are, acid type batteries last 5 to 6 years, the gel glass mats last longer due to less corrosion eating plates and acid breaking down, we make them and they sit, very little in winter as cold is a killer for batteries. when they get shipped we fill and boost. from cheap walmart to high end they are made in same shop. if you live in west region there made in canby oregon where i worked. dealerships get there own label but we make most brands. i would test every optima that goes out and they not as good as ya think. if you are going to go to glass mat go agm...