Yeah optimos were good when they came out but when the company got bought out by one of the major battery manufacturers they quickly turned to sh*t. Project farm over on YouTube just did a test on batteries and the Walmart ones came out ahead simply because they were the best ones for the price there was no sense in buying an expensive battery it's an expensive battery that wasn't as good as a Walmart battery even though Walmart batteries are made by other people lol there's only several there's only a couple of battery manufacturers in the US every year every battery is just relabled a different name.