I waited a few weeks before I wrote this review. I wanted to see how good the new batteries performed. I had two WORKX 56v batteries replaced. I can tell you that I'm very happy with the new batteries replaced by MTO. With my old batteries, the blower would muster less than 5 minutes of use and had to wait for them to charge to continue with yardwork. With the new batteries, I get the yardwork done without having to swap or recharge batteries. The price to replace the old batteries is 1/2 the price of a new one, so essentially got two batteries for the price of a new one.....AND....all replaced and delivered to me as promised within 2 weeks of shipping the old ones back. Would definitely recommend MTO.