Your batteries have likely died on your robot manipulator arm. If you provide us with the model or the robot then we can provide you a quote for replacement batteries and instructions and tech support to change them. You should also consider changing the batteries in the controller unless its the IRC5 version of control where there are no batteries and just an Ultra-Capacitor.
We have all batteries for all makes and models of robots in stock ready to ship same day via UPS.
Thanks