I was skeptical about purchasing this replacement battery for my vacuum but it turned out to be a fantastic decision! My analysis of this product showed that it lasts longer than the original battery and is more eco-friendly .it was incredibly easy to install and fit perfectly with my ECOVACS vacuum. The only drawback is that it was slightly more expensive than other battery replacements on the market, but the added benefits made it well worth the investment. Overall, a highly recommended product for any Home and Kitchen cleaning needs..