I plugged it in and waited 24 hours and then used it to vacuum. It seemed to work fine. Two days later it was still plugged in and I removed the plug and went to vacuum and there was no power. I don’t know if it’s the battery you sent me or If my Dyson just doesn’t work anymore so I hate to give you zero stars but couldn’t give you five. It did arrive quickly and would be a great value if it worked. And again, maybe it’s the Dyson and not the battery. After a Couple days I changed outlets and plugged it in to charge. It charged fine and seems to be working. So I must’ve had a faulty outlet. So I do recommend this product especially for the great price.