My razer viper ultimate wont charge

Hello guys, I bought this mouse two years ago and I had a problem, the mouse never charged and it got hot in the palm area and at the base, near the wireless charging area, so I gave it to my sister . Now my sister has returned the Viper to me and it is still exactly the same, the only difference is that it no longer heats up. I really like this mouse and I want to use it but I don't know how to fix it to use it wireless.