Defective battery and USB connection Ring Gen 1

Hello, I have a technical question about the Ring Doorbell Gen 1, of which I own 2 pieces! One of them has a broken contact for charging via USB, and I have to fumble a lot, until I can even start charching and the other one has a defective battery, because it empties itself within a very short time without activity!Is there a way to repair this or can I unscrew the devices and if so, how !?Best regards