Ryobi 40V Brushless Electric Lawn Mower

This Ryobi 40V electric lawn mower features a brushless motor for powerful performance. It includes a grass collection bag for convenient cleanup. It's a great choice for maintaining your lawn. Missing 1 screw from the handle bar on each side. But works fine if you keep the 2 screws tight. Battery will not charge anymore for some reason. But I have the battery. Am been using a smaller battery that is for a ryobi weed eater. I have its regular battery which I can give to you. I know there is a way to reset them. I just dont know how to do it.